diff --git a/.eslintrc.json b/.eslintrc.json
index cebc0bf3b..9102782ed 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -129,7 +129,6 @@
         "src/views/**/*.js",
         "src/middleware/**/*.js",
         "src/controllers/**/*.js",
-        "src/app/deprecated/**/*",
         "src/app/(migration_remnants)/**/*",
         "src/app/functions/server/breachResolution.ts"
       ],
@@ -149,7 +148,6 @@
       // to avoid a barrage of warnings for older code:
       "files": ["**/*.{ts,tsx}"],
       "excludedFiles": [
-        "./src/app/deprecated/**/*",
         "./src/app/(migration_remnants)/**/*"
       ],
       "extends": [
diff --git a/.stylelintignore b/.stylelintignore
index 5aaf7d3f9..dafb5e1bb 100644
--- a/.stylelintignore
+++ b/.stylelintignore
@@ -1,3 +1,2 @@
 src/client/
 src/app/(nextjs_migration)/
-src/app/deprecated/
diff --git a/src/app/(migration_remnants)/layout.tsx b/src/app/(migration_remnants)/layout.tsx
index 20a36bcf4..6085ddf0f 100644
--- a/src/app/(migration_remnants)/layout.tsx
+++ b/src/app/(migration_remnants)/layout.tsx
@@ -10,7 +10,6 @@ import { HandleFalseDoorTest } from "../deprecated/components/client/FalseDoorBa
 import { getCountryCode } from "../functions/server/getCountryCode";
 import { headers } from "next/headers";
 import AppConstants from "../../appConstants";
-import { getNonce } from "../deprecated/functions/server/getNonce";
 import { getEnabledFeatureFlags } from "../../db/tables/featureFlags";
 
 export default async function MigrationLayout({
diff --git a/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/high-risk-data-breaches/HighRiskBreachLayout.tsx b/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/high-risk-data-breaches/HighRiskBreachLayout.tsx
index ea8902fc7..4d3c57753 100644
--- a/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/high-risk-data-breaches/HighRiskBreachLayout.tsx
+++ b/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/high-risk-data-breaches/HighRiskBreachLayout.tsx
@@ -22,8 +22,10 @@ import {
 } from "../../../../../../../../functions/server/getRelevantGuidedSteps";
 import { getGuidedExperienceBreaches } from "../../../../../../../../functions/universal/guidedExperienceBreaches";
 import { hasPremium } from "../../../../../../../../functions/universal/user";
-import { HighRiskDataTypes } from "../../../../../../../../functions/universal/breach";
-import { BreachBulkResolutionRequest } from "../../../../../../../../deprecated/(authenticated)/user/breaches/breaches";
+import {
+  BreachBulkResolutionRequest,
+  HighRiskDataTypes,
+} from "../../../../../../../../functions/universal/breach";
 import { TelemetryButton } from "../../../../../../../../components/client/TelemetryButton";
 import { TelemetryLink } from "../../../../../../../../components/client/TelemetryLink";
 
diff --git a/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/leaked-passwords/leakedPasswordsData.tsx b/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/leaked-passwords/leakedPasswordsData.tsx
index 760294a28..4ac7e93ab 100644
--- a/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/leaked-passwords/leakedPasswordsData.tsx
+++ b/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/leaked-passwords/leakedPasswordsData.tsx
@@ -10,12 +10,12 @@ import { GuidedExperienceBreaches } from "../../../../../../../../functions/serv
 import { ExtendedReactLocalization } from "../../../../../../../../hooks/l10n";
 import { Button } from "../../../../../../../../components/client/Button";
 import { StepLink } from "../../../../../../../../functions/server/getRelevantGuidedSteps";
+import { getLocale } from "../../../../../../../../functions/universal/getLocale";
+import { TelemetryButton } from "../../../../../../../../components/client/TelemetryButton";
 import {
   BreachResolutionRequest,
   HibpBreachDataTypes,
-} from "../../../../../../../../deprecated/(authenticated)/user/breaches/breaches";
-import { getLocale } from "../../../../../../../../functions/universal/getLocale";
-import { TelemetryButton } from "../../../../../../../../components/client/TelemetryButton";
+} from "../../../../../../../../functions/universal/breach";
 
 export const leakedPasswordTypes = [
   "passwords",
diff --git a/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/security-recommendations/SecurityRecommendationsLayout.tsx b/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/security-recommendations/SecurityRecommendationsLayout.tsx
index fefb5d3ef..f70a32caf 100644
--- a/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/security-recommendations/SecurityRecommendationsLayout.tsx
+++ b/src/app/(proper_react)/(redesign)/(authenticated)/user/(dashboard)/dashboard/fix/security-recommendations/SecurityRecommendationsLayout.tsx
@@ -23,8 +23,10 @@ import {
 } from "../../../../../../../../functions/server/getRelevantGuidedSteps";
 import { getGuidedExperienceBreaches } from "../../../../../../../../functions/universal/guidedExperienceBreaches";
 import { hasPremium } from "../../../../../../../../functions/universal/user";
-import { SecurityRecommendationDataTypes } from "../../../../../../../../functions/universal/breach";
-import { BreachBulkResolutionRequest } from "../../../../../../../../deprecated/(authenticated)/user/breaches/breaches";
+import {
+  BreachBulkResolutionRequest,
+  SecurityRecommendationDataTypes,
+} from "../../../../../../../../functions/universal/breach";
 
 export interface SecurityRecommendationsLayoutProps {
   type: SecurityRecommendationTypes;
diff --git a/src/app/api/v1/scan/route.ts b/src/app/api/v1/scan/route.ts
index 1291a47fd..7f5458a5a 100644
--- a/src/app/api/v1/scan/route.ts
+++ b/src/app/api/v1/scan/route.ts
@@ -9,7 +9,7 @@ import { getBreachesForEmail } from "../../../../utils/hibp";
 import { getSha1 } from "../../../../utils/fxa";
 import { getL10n } from "../../../functions/server/l10n";
 import { getBreachLogo } from "../../../../utils/breachLogo";
-import { Breach } from "../../../deprecated/(authenticated)/user/breaches/breaches";
+import { Breach } from "../../../functions/universal/breach";
 
 export interface RequestBreachScanErrorResponse {
   success: false;
diff --git a/src/app/api/v1/user/breaches/bulk-resolve/route.ts b/src/app/api/v1/user/breaches/bulk-resolve/route.ts
index 5bf9d5972..a8cea2cf7 100644
--- a/src/app/api/v1/user/breaches/bulk-resolve/route.ts
+++ b/src/app/api/v1/user/breaches/bulk-resolve/route.ts
@@ -5,13 +5,13 @@
 import { NextRequest, NextResponse } from "next/server";
 import { getServerSession } from "../../../../../functions/server/getServerSession";
 import { logger } from "../../../../../functions/server/logging";
-import { BreachBulkResolutionRequest } from "../../../../../deprecated/(authenticated)/user/breaches/breaches.js";
 import { getBreaches } from "../../../../../functions/server/getBreaches";
 import { getAllEmailsAndBreaches } from "../../../../../../utils/breaches";
 import {
   getSubscriberByFxaUid,
   setBreachResolution,
 } from "../../../../../../db/tables/subscribers";
+import { BreachBulkResolutionRequest } from "../../../../../functions/universal/breach";
 
 export async function PUT(req: NextRequest): Promise<NextResponse> {
   const session = await getServerSession();
diff --git a/src/app/api/v1/user/breaches/route.ts b/src/app/api/v1/user/breaches/route.ts
index 88daf3493..9d02cd19d 100644
--- a/src/app/api/v1/user/breaches/route.ts
+++ b/src/app/api/v1/user/breaches/route.ts
@@ -6,7 +6,6 @@ import { NextRequest, NextResponse } from "next/server";
 import { getToken } from "next-auth/jwt";
 
 import { logger } from "../../../../functions/server/logging";
-import { BreachResolutionRequest } from "../../../../deprecated/(authenticated)/user/breaches/breaches.js";
 import { getBreaches } from "../../../../functions/server/getBreaches";
 import { getAllEmailsAndBreaches } from "../../../../../utils/breaches";
 import {
@@ -14,6 +13,7 @@ import {
   setBreachResolution,
 } from "../../../../../db/tables/subscribers";
 import appConstants from "../../../../../appConstants";
+import { BreachResolutionRequest } from "../../../../functions/universal/breach";
 
 // Get breaches data
 export async function GET(req: NextRequest) {
diff --git a/src/app/components/client/exposure_card/ExposureCardDataClass.tsx b/src/app/components/client/exposure_card/ExposureCardDataClass.tsx
index 4006aa6de..bb970ae7e 100644
--- a/src/app/components/client/exposure_card/ExposureCardDataClass.tsx
+++ b/src/app/components/client/exposure_card/ExposureCardDataClass.tsx
@@ -9,7 +9,7 @@ import { OnerepScanResultRow } from "knex/types/tables";
 import styles from "./ExposureCard.module.scss";
 import { useL10n } from "../../../hooks/l10n";
 import { Exposure, isScanResult } from "./ExposureCard";
-import { HibpBreachDataTypes } from "../../../deprecated/(authenticated)/user/breaches/breaches";
+import { HibpBreachDataTypes } from "../../../functions/universal/breach";
 
 type OnerepScanResultSerializedColumns = Extract<
   keyof OnerepScanResultRow,
diff --git a/src/app/deprecated/(authenticated)/admin/emails/[template]/page.tsx b/src/app/deprecated/(authenticated)/admin/emails/[template]/page.tsx
deleted file mode 100644
index ccdd5f406..000000000
--- a/src/app/deprecated/(authenticated)/admin/emails/[template]/page.tsx
+++ /dev/null
@@ -1,172 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { redirect } from "next/navigation";
-import Script from "next/script";
-import appConstants from "../../../../../../appConstants";
-import {
-  EmailTemplateType,
-  getMonthlyDummyData,
-  getNotificationDummyData,
-  getSignupReportDummyData,
-  getVerificationDummyData,
-} from "../../../../../../utils/email";
-import { getPreviewTemplate } from "../../../../../../views/emails/email2022";
-import { verifyPartial } from "../../../../../../views/emails/emailVerify";
-import { breachAlertEmailPartial } from "../../../../../../views/emails/emailBreachAlert";
-import { monthlyUnresolvedEmailPartial } from "../../../../../../views/emails/emailMonthlyUnresolved";
-import { signupReportEmailPartial } from "../../../../../../views/emails/emailSignupReport";
-import { getL10n } from "../../../../../functions/server/l10n";
-import { ReactLocalization } from "@fluent/react";
-import { getNonce } from "../../../../functions/server/getNonce";
-import { getServerSession } from "../../../../../functions/server/getServerSession";
-
-declare global {
-  // eslint-disable-next-line @typescript-eslint/no-namespace
-  namespace JSX {
-    interface IntrinsicElements {
-      "custom-select": {
-        name: string;
-        dangerouslySetInnerHTML: { __html: string };
-      };
-    }
-  }
-}
-
-export default async function EmailTemplatePage(props: {
-  params: { template: string };
-}) {
-  const session = await getServerSession();
-
-  if (!session?.user.email) {
-    return redirect("/");
-  }
-
-  const admins = process.env.ADMINS?.split(",") ?? [];
-  // Note: ../layout.tsx currently hides this page for non-admins.
-  //       Not sure if we actually want to have this available to non-admins as well.
-  const isAdminPreview = admins.includes(session.user.email);
-  const chosenTemplate =
-    Object.values(EmailTemplateType).find((t) => t === props.params.template) ??
-    EmailTemplateType.Verification;
-  const l10n = getL10n();
-  const templates = getTemplatesData(l10n);
-  const selectedPreviewTemplate = templates[chosenTemplate].template;
-  const recipients = [session.user.email];
-  if (appConstants.EMAIL_TEST_RECIPIENT) {
-    recipients.push(appConstants.EMAIL_TEST_RECIPIENT);
-  }
-
-  return (
-    <div data-partial="emailPreview">
-      <Script
-        type="module"
-        src="/nextjs_migration/client/js/customSelect.js"
-        nonce={getNonce()}
-      />
-      <Script
-        type="module"
-        src="/nextjs_migration/client/js/emailPreview.js"
-        nonce={getNonce()}
-      />
-      <section className="email-preview js-email">
-        <h1>Email preview</h1>
-        <div className="email-preview-controls">
-          <custom-select
-            name="email-template"
-            dangerouslySetInnerHTML={{
-              __html: getPreviewOptions(chosenTemplate, templates),
-            }}
-          />
-          {isAdminPreview ? (
-            <form className="js-email-preview-form email-preview-form">
-              {getRecipientInputs(recipients)}
-              <button className="primary" type="submit">
-                Send test email
-              </button>
-            </form>
-          ) : null}
-        </div>
-        <hr className="monitor-gradient" />
-        <div dangerouslySetInnerHTML={{ __html: selectedPreviewTemplate }} />
-      </section>
-    </div>
-  );
-}
-
-function getTemplatesData(l10n: ReactLocalization) {
-  return {
-    [EmailTemplateType.Verification]: {
-      label: "Email verification",
-      template: getPreviewTemplate(
-        getVerificationDummyData(appConstants.EMAIL_TEST_RECIPIENT, l10n),
-        verifyPartial,
-        l10n,
-      ),
-    },
-    [EmailTemplateType.Notification]: {
-      label: "Breach notification",
-      template: getPreviewTemplate(
-        getNotificationDummyData(appConstants.EMAIL_TEST_RECIPIENT, l10n),
-        breachAlertEmailPartial,
-        l10n,
-      ),
-    },
-    [EmailTemplateType.Monthly]: {
-      label: "Monthly unresolved breaches",
-      template: getPreviewTemplate(
-        getMonthlyDummyData(appConstants.EMAIL_TEST_RECIPIENT, l10n),
-        monthlyUnresolvedEmailPartial,
-        l10n,
-      ),
-    },
-    [EmailTemplateType.SignupReport]: {
-      label: "Signup report",
-      template: getPreviewTemplate(
-        getSignupReportDummyData(appConstants.EMAIL_TEST_RECIPIENT, l10n),
-        signupReportEmailPartial,
-        l10n,
-      ),
-    },
-  };
-}
-
-// Transitioning from untyped JS:
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-function getPreviewOptions(currentTemplateKey: string, data: any) {
-  const optionsElements = Object.keys(data)
-    .map(
-      (templateKey) => `
-    <option
-      value='${templateKey}'
-      ${currentTemplateKey === templateKey ? "selected" : ""}
-    >
-      ${data[templateKey].label as string}
-    </option>
-  `,
-    )
-    .join("");
-
-  return optionsElements;
-}
-
-// Transitioning from untyped JS:
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-function getRecipientInputs(recipients: any[]) {
-  const recipientInputElements = recipients.map((recipient, index) => {
-    return (
-      <label key={recipient}>
-        <input
-          name="email-recipient-option"
-          type="radio"
-          value={recipient}
-          checked={index === 0}
-        />
-        {recipient}
-      </label>
-    );
-  });
-
-  return <fieldset>{recipientInputElements}</fieldset>;
-}
diff --git a/src/app/deprecated/(authenticated)/admin/emails/page.tsx b/src/app/deprecated/(authenticated)/admin/emails/page.tsx
deleted file mode 100644
index 2f7e2a839..000000000
--- a/src/app/deprecated/(authenticated)/admin/emails/page.tsx
+++ /dev/null
@@ -1,24 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { notFound, redirect } from "next/navigation";
-import { getServerSession } from "../../../../functions/server/getServerSession";
-import { EmailTemplateType } from "../../../../../utils/email";
-
-export default async function EmailRootPage() {
-  const session = await getServerSession();
-
-  if (!session?.user.email) {
-    return notFound();
-  }
-
-  const admins = process.env.ADMINS?.split(",") ?? [];
-  const isAdmin = admins.includes(session.user.email);
-
-  if (!isAdmin) {
-    return notFound();
-  }
-
-  return redirect("./emails/" + EmailTemplateType.Verification);
-}
diff --git a/src/app/deprecated/(authenticated)/admin/layout.tsx b/src/app/deprecated/(authenticated)/admin/layout.tsx
deleted file mode 100644
index bc8b84165..000000000
--- a/src/app/deprecated/(authenticated)/admin/layout.tsx
+++ /dev/null
@@ -1,28 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { ReactNode } from "react";
-import { notFound } from "next/navigation";
-import { getServerSession } from "../../../functions/server/getServerSession";
-
-import "../../../../client/css/index.css";
-export type Props = {
-  children: ReactNode;
-};
-
-const AdminLayout = async (props: Props) => {
-  const session = await getServerSession();
-  const admins = process.env.ADMINS?.split(",") ?? [];
-  if (
-    !session ||
-    typeof session.user.email !== "string" ||
-    !admins.includes(session.user.email)
-  ) {
-    return notFound();
-  }
-
-  return <>{props.children}</>;
-};
-
-export default AdminLayout;
diff --git a/src/app/deprecated/(authenticated)/admin/page.tsx b/src/app/deprecated/(authenticated)/admin/page.tsx
deleted file mode 100644
index 4ec06bc7b..000000000
--- a/src/app/deprecated/(authenticated)/admin/page.tsx
+++ /dev/null
@@ -1,20 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-export default function AdminPage() {
-  return (
-    <section>
-      <h1>Admin</h1>
-
-      <ul>
-        <li>
-          <a href="/admin/emails">Email preview</a>
-        </li>
-        <li>
-          <a href="/admin/location-search">Location search</a>
-        </li>
-      </ul>
-    </section>
-  );
-}
diff --git a/src/app/deprecated/(authenticated)/admin/send-test-email/route.ts b/src/app/deprecated/(authenticated)/admin/send-test-email/route.ts
deleted file mode 100644
index 0be9a79ed..000000000
--- a/src/app/deprecated/(authenticated)/admin/send-test-email/route.ts
+++ /dev/null
@@ -1,121 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { NextRequest, NextResponse } from "next/server";
-import AppConstants from "../../../../../appConstants.js";
-import { logger } from "../../../../functions/server/logging";
-import {
-  EmailTemplateType,
-  getMonthlyDummyData,
-  getSignupReportDummyData,
-  getVerificationDummyData,
-  initEmail,
-  sendEmail,
-} from "../../../../../utils/email.js";
-import { getTemplate } from "../../../../../views/emails/email2022.js";
-import { getL10n } from "../../../../functions/server/l10n";
-import { verifyPartial } from "../../../../../views/emails/emailVerify.js";
-import { monthlyUnresolvedEmailPartial } from "../../../../../views/emails/emailMonthlyUnresolved.js";
-import { signupReportEmailPartial } from "../../../../../views/emails/emailSignupReport.js";
-
-export async function POST(req: NextRequest) {
-  const { emailId, recipient } = (await req.json()) as {
-    emailId: string;
-    recipient: string;
-  };
-  const l10n = getL10n();
-
-  switch (emailId) {
-    case EmailTemplateType.Verification: {
-      // Send test verification email
-      const emailTemplate = getTemplate(
-        getVerificationDummyData(recipient, l10n),
-        verifyPartial,
-        l10n,
-      );
-      await initEmail(process.env.SMTP_URL);
-      await sendEmail(
-        recipient,
-        l10n.getString("email-subject-verify"),
-        emailTemplate,
-      );
-      break;
-    }
-    case EmailTemplateType.Notification: {
-      // Send test breach notification email
-      await sendTestNotification(req, new NextResponse());
-      break;
-    }
-    case EmailTemplateType.Monthly: {
-      // Send test monthly unresolved breaches email
-      const emailTemplate = getTemplate(
-        getMonthlyDummyData(AppConstants.EMAIL_TEST_RECIPIENT, l10n),
-        monthlyUnresolvedEmailPartial,
-        l10n,
-      );
-      await initEmail(process.env.SMTP_URL);
-      await sendEmail(
-        recipient,
-        l10n.getString("email-unresolved-heading"),
-        emailTemplate,
-      );
-      break;
-    }
-    case EmailTemplateType.SignupReport: {
-      // Send test sign-up report email
-      const emailTemplate = getTemplate(
-        getSignupReportDummyData(AppConstants.EMAIL_TEST_RECIPIENT, l10n),
-        signupReportEmailPartial,
-        l10n,
-      );
-      await initEmail(process.env.SMTP_URL);
-      await sendEmail(
-        recipient,
-        l10n.getString("email-subject-found-breaches"),
-        emailTemplate,
-      );
-      break;
-    }
-    default: {
-      throw new Error(`No test email found for ${emailId}`);
-    }
-  }
-
-  logger.info(`Sent test email: ${emailId}`);
-
-  // The notify function has its own response
-  if (emailId !== EmailTemplateType.Notification) {
-    return NextResponse.json(
-      { success: true, message: `Sent test ${emailId} email` },
-      { status: 200 },
-    );
-  }
-}
-
-// Leaving the `async` for now because of the commented-out `await`:
-// eslint-disable-next-line @typescript-eslint/require-await
-async function sendTestNotification(_req: NextRequest, _res: NextResponse) {
-  // The test breach notification can be viewed in the public Mailinator inbox
-  // as documented in the README:
-  // https://github.com/mozilla/blurts-server#trigger-breach-alert-email
-  const _breachNotificationData = {
-    breachName: "Adobe",
-    // Hash for dummy email `localmonitor20200827@mailinator.com`
-    hashPrefix: "365050",
-    hashSuffixes: ["53cbb89874fc738c0512daf12bc4d91765"],
-  };
-
-  // TODO Disabled for now; not sure yet how to trigger this with the functionality
-  // moved to a Cloud Function.
-  // const notifyReq = {
-  //   app: req.app,
-  //   body: {
-  //     ...req.body,
-  //     ...breachNotificationData,
-  //   },
-  //   token: AppConstants.HIBP_NOTIFY_TOKEN,
-  // };
-
-  // await notify(notifyReq, res);
-}
diff --git a/src/app/deprecated/(authenticated)/user/breaches/breaches.d.ts b/src/app/deprecated/(authenticated)/user/breaches/breaches.d.ts
deleted file mode 100644
index 638c7c1d5..000000000
--- a/src/app/deprecated/(authenticated)/user/breaches/breaches.d.ts
+++ /dev/null
@@ -1,139 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { BreachDataTypes } from "../../../../functions/universal/breach.js";
-
-export type BreachResolutionTypes = Record<
-  keyof BreachDataTypes,
-  BreachResolution
->;
-export interface CircleChartProps
-  extends React.DetailedHTMLProps<
-    React.HTMLAttributes<HTMLElement>,
-    HTMLElement
-  > {
-  class?: string;
-  title?: string;
-  "data-txt-other"?: string;
-  "data-txt-none"?: string;
-  data?: string;
-}
-
-export type HibpBreachDataTypes = typeof BreachDataTypes;
-
-export interface BreachResolution {
-  priority: number;
-  header: string;
-  body?: string;
-  applicableCountryCodes?: Array<string>;
-}
-
-export interface SubscriberEmail {
-  email: string;
-  id: number;
-}
-
-export interface BreachStats {
-  monitoredEmails: {
-    count: number;
-  };
-  numBreaches: {
-    count: number;
-    numResolved: number;
-    numUnresolved: number;
-  };
-  passwords: {
-    count: number;
-    numResolved: number;
-  };
-}
-
-export interface SubscriberBreachResolution {
-  useBreachId?: boolean;
-  [email: string]: {
-    [id: number]: {
-      resolutionsChecked: Array<string>;
-    };
-  };
-}
-
-export interface Breach {
-  AddedDate: string;
-  BreachDate: string;
-  DataClasses: Array<string>;
-  Description: string;
-  Domain: string;
-  Id: number;
-  IsFabricated: boolean;
-  IsMalware: boolean;
-  IsResolved?: boolean;
-  IsRetired: boolean;
-  IsSensitive: boolean;
-  IsSpamList: boolean;
-  IsVerified: boolean;
-  LogoPath: string;
-  ModifiedDate: string;
-  Name: string;
-  PwnCount: number;
-  recencyIndex: number;
-  ResolutionsChecked: Array<string>;
-  Title: string;
-}
-
-/**
- * @deprecated Use {@see SubscriberRow} instead
- */
-export interface Subscriber {
-  id: number;
-  primary_sha1: string;
-  primary_email: string;
-  primary_verification_token: string;
-  primary_verified: boolean;
-  created_at: Date;
-  updated_at: Date;
-  fx_newsletter: boolean;
-  signup_language: string;
-  fxa_refresh_token: string;
-  fxa_profile_json: {
-    uid: string;
-    email: string;
-    avatar: string;
-    locale: string;
-    amrValues: Array<string>;
-    avatarDefault: boolean;
-    metricsEnabled: boolean;
-    twoFactorAuthentication: boolean;
-  };
-  fxa_uid: string;
-  breaches_last_shown: Date;
-  all_emails_to_primary: boolean;
-  fxa_access_token: string;
-  breaches_resolved: {
-    [email: string]: Array<Breach>;
-  };
-  waitlists_joined: boolean | null;
-  breach_stats: BreachStats;
-  monthly_email_at: Date | null;
-  monthly_email_optout: boolean | null;
-  breach_resolution: SubscriberBreachResolution;
-  email_addresses: Array<SubscriberEmail>;
-}
-
-export interface VerifiedEmail {
-  breaches: Array<Breach>;
-  email: string;
-  id: number;
-  primary: boolean;
-  verified: boolean;
-}
-
-export interface BreachResolutionRequest {
-  affectedEmail: string;
-  breachId: number;
-  resolutionsChecked: Array<HibpBreachDataTypes[keyof HibpBreachDataTypes]>;
-}
-
-export interface BreachBulkResolutionRequest {
-  dataType: BreachDataTypes;
-}
diff --git a/src/app/deprecated/(authenticated)/user/breaches/page.tsx b/src/app/deprecated/(authenticated)/user/breaches/page.tsx
deleted file mode 100644
index 8336e5fd2..000000000
--- a/src/app/deprecated/(authenticated)/user/breaches/page.tsx
+++ /dev/null
@@ -1,187 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import Image from "next/image";
-import Script from "next/script";
-import { headers } from "next/headers";
-import { getServerSession } from "../../../../functions/server/getServerSession";
-import { CircleChartProps } from "./breaches.d";
-
-import { getL10n } from "../../../../functions/server/l10n";
-import {
-  getUserBreaches,
-  type UserBreaches as UserBreachesType,
-} from "../../../../functions/server/getUserBreaches";
-
-import "../../../../../client/css/partials/breaches.css";
-import ImageIconEmail from "../../../../../client/images/icon-email.svg";
-
-import { BreachesTable } from "../../../components/server/BreachesTable";
-import { getComponentAsString } from "../../../functions/server/getComponentAsString";
-import { getCountryCode } from "../../../../functions/server/getCountryCode";
-import { getNonce } from "../../../functions/server/getNonce";
-import { SignInButton } from "../../../components/client/SignInButton";
-import { CONST_MAX_NUM_ADDRESSES } from "../../../../../constants";
-
-export function generateMetadata() {
-  const l10n = getL10n();
-  return {
-    title: l10n.getString("breach-meta-title"),
-    twitter: {
-      card: "summary_large_image",
-      title: l10n.getString("brand-mozilla-monitor"),
-      description: l10n.getString("meta-desc-2"),
-      images: ["/images/og-image.webp"],
-    },
-    openGraph: {
-      title: l10n.getString("brand-mozilla-monitor"),
-      description: l10n.getString("meta-desc-2"),
-      siteName: l10n.getString("brand-mozilla-monitor"),
-      type: "website",
-      url: process.env.SERVER_URL,
-      images: ["/images/og-image.webp"],
-    },
-  };
-}
-
-function createEmailOptions({
-  breachesData,
-  emailSelectIndex,
-}: UserBreachesType) {
-  const emails = breachesData.verifiedEmails.map((obj) => obj.email);
-  const optionElements = emails.map(
-    (email, index) =>
-      `<option ${
-        emailSelectIndex === index ? "selected" : ""
-      }>${email}</option>`,
-  );
-
-  return optionElements.join("");
-}
-
-declare global {
-  // eslint-disable-next-line @typescript-eslint/no-namespace
-  namespace JSX {
-    interface IntrinsicElements {
-      "circle-chart": CircleChartProps;
-    }
-  }
-}
-
-export default async function UserBreaches() {
-  const session = await getServerSession();
-  if (!session?.user?.subscriber) {
-    return <SignInButton autoSignIn />;
-  }
-
-  const l10n = getL10n();
-  const headerList = headers();
-
-  const userBreachesData: UserBreachesType = await getUserBreaches({
-    user: session.user,
-    options: {
-      countryCode: getCountryCode(headerList),
-    },
-  });
-
-  return (
-    <>
-      {/* These scripts predate the use of React and thus shouldn’t wait for
-      hydration to adjust the layout. */}
-      {/* eslint-disable @next/next/no-sync-scripts */}
-      <script
-        type="module"
-        src="/nextjs_migration/client/js/customSelect.js"
-        rel="preload"
-        crossOrigin="anonymous"
-        nonce={getNonce()}
-      />
-      <script
-        type="module"
-        src="/nextjs_migration/client/js/circleChart.js"
-        rel="preload"
-        crossOrigin="anonymous"
-        nonce={getNonce()}
-      />
-      <script
-        type="module"
-        src="/nextjs_migration/client/js/breaches.js"
-        rel="preload"
-        crossOrigin="anonymous"
-        nonce={getNonce()}
-      />
-      {/* eslint-enable @next/next/no-sync-scripts */}
-      <Script
-        type="module"
-        src="/nextjs_migration/client/js/dialog.js"
-        nonce={getNonce()}
-      />
-
-      <main data-partial="breaches">
-        <section>
-          <header className="breaches-header">
-            <h1
-              // The DOM for this element is modified by regular JavaScript
-              // files that predate our migration to Next.js. We don’t use any
-              // React-specific features here, so hydration errors should
-              // not be a problem.
-              suppressHydrationWarning
-              dangerouslySetInnerHTML={{
-                __html: l10n.getString("breach-heading-email", {
-                  "email-select": `<custom-select name="email-account">${createEmailOptions(
-                    userBreachesData,
-                  )}</custom-select>`,
-                }),
-              }}
-            />
-
-            <circle-chart
-              // The DOM for this element is modified by regular JavaScript
-              // files that predate our migration to Next.js. We don’t use any
-              // React-specific features here, so hydration errors should
-              // not be a problem.
-              suppressHydrationWarning
-              class="breach-chart"
-              title={l10n.getString("breach-chart-title")}
-              data-txt-other={l10n.getString("other-data-class")}
-              data-txt-none={l10n.getString("none-data-class")}
-            ></circle-chart>
-
-            <figure
-              className="email-stats"
-              data-count={userBreachesData.emailTotalCount}
-              data-total={CONST_MAX_NUM_ADDRESSES}
-            >
-              <Image src={ImageIconEmail} alt="" width={55} height={30} />
-              <figcaption>
-                <strong>
-                  {l10n.getString("emails-monitored", {
-                    count: userBreachesData.emailVerifiedCount,
-                    total: CONST_MAX_NUM_ADDRESSES,
-                  })}
-                </strong>
-                <a href="/user/settings">
-                  {l10n.getString("manage-emails-link")}
-                </a>
-              </figcaption>
-            </figure>
-          </header>
-        </section>
-
-        <div
-          // The DOM for this element is modified by regular JavaScript
-          // files that predate our migration to Next.js. We don’t use any
-          // React-specific features here, so hydration errors should
-          // not be a problem.
-          suppressHydrationWarning
-          dangerouslySetInnerHTML={{
-            __html: await getComponentAsString({
-              component: <BreachesTable userBreaches={userBreachesData} />,
-            }),
-          }}
-        />
-      </main>
-    </>
-  );
-}
diff --git a/src/app/deprecated/(authenticated)/user/dashboard/page.tsx b/src/app/deprecated/(authenticated)/user/dashboard/page.tsx
deleted file mode 100644
index 4f3d3271b..000000000
--- a/src/app/deprecated/(authenticated)/user/dashboard/page.tsx
+++ /dev/null
@@ -1,9 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { redirect } from "next/navigation";
-
-export default function UserDashboard() {
-  redirect("/user/breaches");
-}
diff --git a/src/app/deprecated/(authenticated)/user/layout.tsx b/src/app/deprecated/(authenticated)/user/layout.tsx
deleted file mode 100644
index 66dd56a1f..000000000
--- a/src/app/deprecated/(authenticated)/user/layout.tsx
+++ /dev/null
@@ -1,152 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { ReactNode } from "react";
-import Image from "next/image";
-import Script from "next/script";
-
-import { logger } from "../../../functions/server/logging";
-import "../../../../client/css/index.css";
-import { UserMenu } from "../../components/client/UserMenu";
-import { SignInButton } from "../../components/client/SignInButton";
-import { SiteNavigation } from "../../components/client/SiteNavigation";
-import AppConstants from "../../../../appConstants.js";
-import MonitorLogo from "../../../../client/images/monitor-logo-transparent@2x.webp";
-import MozillaLogo from "../../../../client/images/moz-logo-1color-white-rgb-01.svg";
-import { getL10n } from "../../../functions/server/l10n";
-import { getNonce } from "../../functions/server/getNonce";
-import { PageLoadEvent } from "../../../components/client/PageLoadEvent";
-import { getExperiments } from "../../../functions/server/getExperiments";
-import { getEnabledFeatureFlags } from "../../../../db/tables/featureFlags";
-import { getServerSession } from "../../../functions/server/getServerSession";
-
-export type Props = {
-  children: ReactNode;
-};
-
-const MainLayout = async (props: Props) => {
-  const session = await getServerSession();
-  if (!session?.user?.subscriber) {
-    return <SignInButton autoSignIn />;
-  }
-
-  const userId = session.user.subscriber.fxa_uid ?? "";
-
-  if (!userId) {
-    logger.error("No user ID for telemetry");
-  }
-
-  try {
-    // TODO For initial A/A testing `features` is unused. https://mozilla-hub.atlassian.net/browse/MNTOR-2182
-    const features = await getExperiments(userId);
-    // TODO remove debug for A/A testing https://mozilla-hub.atlassian.net/browse/MNTOR-2182
-    logger.debug("Nimbus features in authenticated session:", features);
-  } catch (ex) {
-    logger.error("Could not fetch Nimbus features:", ex);
-  }
-
-  const l10n = getL10n();
-  const enabledFeatureFlags = await getEnabledFeatureFlags({
-    email: session.user.email,
-  });
-
-  return (
-    <>
-      <Script
-        type="module"
-        src="/nextjs_migration/client/js/nav.js"
-        nonce={getNonce()}
-      />
-      <PageLoadEvent userId={userId} enabledFlags={enabledFeatureFlags} />
-      <header>
-        <div className="header-wrapper">
-          <a href="/user/breaches">
-            <Image
-              className="monitor-logo"
-              src={MonitorLogo}
-              width="213"
-              height="33"
-              alt={l10n.getString("brand-mozilla-monitor")}
-              priority
-            />
-          </a>
-          <div className="nav-wrapper">
-            <button className="nav-toggle">
-              <svg
-                xmlns="http://www.w3.org/2000/svg"
-                viewBox="0 0 10 8"
-                width="20"
-              >
-                <path
-                  d="M1 1h8M1 4h8M1 7h8"
-                  stroke="#000"
-                  strokeWidth="1"
-                  strokeLinecap="round"
-                />
-              </svg>
-            </button>
-            <UserMenu
-              session={session}
-              fxaSettingsUrl={AppConstants.FXA_SETTINGS_URL}
-              nonce={getNonce()}
-              enabledFeatureFlags={enabledFeatureFlags}
-            />
-          </div>
-        </div>
-      </header>
-
-      <SiteNavigation />
-
-      {props.children}
-
-      <footer className="site-footer">
-        <a href="https://www.mozilla.org" target="_blank">
-          <Image
-            src={MozillaLogo}
-            width="100"
-            height="29"
-            loading="lazy"
-            alt={l10n.getString("mozilla")}
-          />
-        </a>
-        <menu>
-          <li>
-            <a href="/breaches">{l10n.getString("footer-nav-all-breaches")}</a>
-          </li>
-          <li>
-            <a
-              href="https://support.mozilla.org/kb/firefox-monitor-faq"
-              target="_blank"
-            >
-              FAQ
-            </a>
-          </li>
-          <li>
-            <a
-              href="https://www.mozilla.org/about/legal/terms/subscription-services/"
-              target="_blank"
-            >
-              {l10n.getString("terms-of-service")}
-            </a>
-          </li>
-          <li>
-            <a
-              href="https://www.mozilla.org/privacy/subscription-services/"
-              target="_blank"
-            >
-              {l10n.getString("privacy-notice")}
-            </a>
-          </li>
-          <li>
-            <a href="https://github.com/mozilla/blurts-server" target="_blank">
-              {l10n.getString("github")}
-            </a>
-          </li>
-        </menu>
-      </footer>
-    </>
-  );
-};
-
-export default MainLayout;
diff --git a/src/app/deprecated/(authenticated)/user/settings/page.tsx b/src/app/deprecated/(authenticated)/user/settings/page.tsx
deleted file mode 100644
index 7786eff6d..000000000
--- a/src/app/deprecated/(authenticated)/user/settings/page.tsx
+++ /dev/null
@@ -1,262 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { redirect } from "next/navigation";
-import Image from "next/image";
-import Script from "next/script";
-import { EmailAddressRow } from "knex/types/tables";
-import AppConstants from "../../../../../appConstants";
-import { getL10n } from "../../../../functions/server/l10n";
-import ImageIconDelete from "../../../../../client/images/icon-delete.svg";
-import "../../../../../client/css/partials/settings.css";
-import React from "react";
-import { getUserEmails } from "../../../../../db/tables/emailAddresses";
-import { getBreaches } from "../../../../functions/server/getBreaches";
-import { getBreachesForEmail } from "../../../../../utils/hibp";
-import { getSha1 } from "../../../../../utils/fxa";
-import { getSubscriberById } from "../../../../../db/tables/subscribers";
-import { getNonce } from "../../../functions/server/getNonce";
-import { CONST_MAX_NUM_ADDRESSES } from "../../../../../constants";
-import { getServerSession } from "../../../../functions/server/getServerSession";
-
-const emailNeedsVerificationSub = (email: EmailAddressRow) => {
-  const l10n = getL10n();
-
-  return (
-    <>
-      <span className="verification-required">
-        {l10n.getString("settings-email-verification-callout")}
-      </span>
-
-      <a className="js-settings-resend-email" data-email-id={email.id} href="#">
-        {l10n.getString("settings-resend-email-verification-link")}
-      </a>
-    </>
-  );
-};
-
-const deleteButton = (email: EmailAddressRow) => {
-  const l10n = getL10n();
-
-  return (
-    <button
-      aria-label={l10n.getString("settings-delete-email-button")}
-      data-subscriber-id={email.subscriber_id}
-      data-email-id={email.id}
-      className="settings-email-remove-button js-remove-email-button"
-    >
-      <Image
-        src={ImageIconDelete}
-        alt={l10n.getString("settings-delete-email-button")}
-      />
-    </button>
-  );
-};
-
-const createEmailItem = (
-  email: EmailAddressRow & { primary?: boolean },
-  breachCounts: Map<string, number>,
-) => {
-  const l10n = getL10n();
-
-  return (
-    <li className="settings-email-item">
-      <strong>
-        {email.primary
-          ? l10n.getString("settings-email-label-primary", {
-              email: email.email,
-            })
-          : email.email}
-      </strong>
-      {email.verified
-        ? l10n.getString("settings-email-number-of-breaches-info", {
-            breachCount: breachCounts.get(email.email)!,
-          })
-        : emailNeedsVerificationSub(email)}
-      {email.primary ? null : deleteButton(email)}
-    </li>
-  );
-};
-
-// Moves the primary email to the front and sorts the rest alphabeticaly.
-const getSortedEmails = (
-  emails: Array<EmailAddressRow & { primary?: boolean }>,
-) =>
-  [...emails].sort((a, b) => {
-    if (a.primary) {
-      return -1;
-    }
-
-    if (b.primary) {
-      return 1;
-    }
-
-    return a.email.localeCompare(b.email);
-  });
-
-const createEmailList = (
-  emails: EmailAddressRow[],
-  breachCounts: Map<string, number>,
-) => {
-  return (
-    <ul className="settings-email-list">
-      {getSortedEmails(emails).map((email) =>
-        createEmailItem(email, breachCounts),
-      )}
-    </ul>
-  );
-};
-
-const alertOptions = ({
-  allEmailsToPrimary,
-}: {
-  allEmailsToPrimary: boolean;
-}) => {
-  const l10n = getL10n();
-
-  return (
-    <div className="settings-alert-options">
-      <label className="settings-radio-input">
-        <input
-          defaultChecked={!allEmailsToPrimary}
-          className="js-settings-alert-options-input"
-          data-alert-option={0}
-          name="settings-alert-options"
-          type="radio"
-        />
-        <span className="settings-radio-label">
-          {l10n.getString("settings-alert-preferences-option-one")}
-        </span>
-      </label>
-
-      <label className="settings-radio-input">
-        <input
-          defaultChecked={allEmailsToPrimary}
-          className="js-settings-alert-options-input"
-          data-alert-option={1}
-          name="settings-alert-options"
-          type="radio"
-        />
-        <span className="settings-radio-label">
-          {l10n.getString("settings-alert-preferences-option-two")}
-        </span>
-      </label>
-    </div>
-  );
-};
-
-export default async function Settings() {
-  const l10n = getL10n();
-  const session = await getServerSession();
-  if (!session || !session.user?.subscriber) {
-    return redirect("/");
-  }
-
-  // Re-fetch the subscriber every time, rather than reading it from `session`
-  // - if the user changes their preferences on this page, the JSON web token
-  // containing the subscriber data won't be updated until the next sign-in.
-  // (Possibly we shouldn't store subscriber data in that token in the first
-  // place, other than their ID?)
-  const subscriber = await getSubscriberById(session.user.subscriber.id);
-  const emails = await getUserEmails(session.user.subscriber.id);
-  // Add primary subscriber email to the list
-  emails.push({
-    email: session.user.subscriber.primary_email,
-    sha1: session.user.subscriber.primary_sha1,
-    primary: true,
-    verified: true,
-    // This is old code that mixed objects with different structure in the same
-    // array, hence the need to assert `any`:
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  } as any);
-
-  const breachCounts = new Map();
-  const allBreaches = await getBreaches();
-  for (const email of emails) {
-    const breaches = await getBreachesForEmail(
-      getSha1(email.email),
-      allBreaches,
-      true,
-    );
-    breachCounts.set(email.email, breaches?.length || 0);
-  }
-
-  return (
-    <>
-      <Script
-        type="module"
-        src="/nextjs_migration/client/js/settings.js"
-        nonce={getNonce()}
-      />
-      <Script
-        type="module"
-        src="/nextjs_migration/client/js/dialog.js"
-        nonce={getNonce()}
-      />
-      <main data-partial="settings">
-        <div className="settings js-settings">
-          <h2 className="settings-title">
-            {l10n.getString("settings-page-title")}
-          </h2>
-
-          <div className="settings-content">
-            {/* Monitored email addresses */}
-            <section>
-              <h3 className="settings-section-title">
-                {l10n.getString("settings-email-list-title")}
-              </h3>
-              <p className="settings-section-info">
-                {l10n.getString("settings-email-limit-info", {
-                  limit: CONST_MAX_NUM_ADDRESSES,
-                })}
-              </p>
-
-              {createEmailList(emails, breachCounts)}
-              <button
-                aria-label={l10n.getString("settings-add-email-button")}
-                className="primary settings-add-email-button"
-                data-dialog="addEmail"
-                disabled={emails.length >= CONST_MAX_NUM_ADDRESSES}
-              >
-                {l10n.getString("settings-add-email-button")}
-              </button>
-            </section>
-
-            <hr />
-
-            {/* Breach alert preferences */}
-            <section>
-              <h3 className="settings-section-title">
-                {l10n.getString("settings-alert-preferences-title")}
-              </h3>
-              {alertOptions({
-                allEmailsToPrimary: subscriber.all_emails_to_primary,
-              })}
-            </section>
-
-            <hr />
-
-            {/* Deactivate account */}
-            <section>
-              <h3 className="settings-section-title">
-                {l10n.getString("settings-deactivate-account-title")}
-              </h3>
-              <p className="settings-section-info">
-                {l10n.getString("settings-deactivate-account-info-2")}
-              </p>
-              <a
-                className="settings-link-fxa"
-                href={AppConstants.FXA_SETTINGS_URL}
-                target="_blank"
-                rel="noopener noreferrer"
-              >
-                {l10n.getString("settings-fxa-link-label-3")}
-              </a>
-            </section>
-          </div>
-        </div>
-      </main>
-    </>
-  );
-}
diff --git a/src/app/deprecated/(dialogs)/user/dialog/addEmail/route.ts b/src/app/deprecated/(dialogs)/user/dialog/addEmail/route.ts
deleted file mode 100644
index 8acc45f72..000000000
--- a/src/app/deprecated/(dialogs)/user/dialog/addEmail/route.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { NextResponse } from "next/server";
-
-import { getComponentAsString } from "../../../../functions/server/getComponentAsString";
-import AddEmailDialog from "../../../../components/server/AddEmailDialog";
-
-export async function GET() {
-  try {
-    const dialogContentString = await getComponentAsString({
-      component: AddEmailDialog(),
-    });
-
-    return new NextResponse(dialogContentString, { status: 200 });
-  } catch (e) {
-    return NextResponse.json({ success: false }, { status: 500 });
-  }
-}
diff --git a/src/app/deprecated/(guest)/layout.tsx b/src/app/deprecated/(guest)/layout.tsx
deleted file mode 100644
index 80d51e170..000000000
--- a/src/app/deprecated/(guest)/layout.tsx
+++ /dev/null
@@ -1,121 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { v5 as uuidv5 } from "uuid";
-import { ReactNode } from "react";
-
-import { logger } from "../../functions/server/logging";
-import "../../../client/css/index.css";
-import Image from "next/image";
-import MonitorLogo from "../../../client/images/monitor-logo-transparent@2x.webp";
-import MozillaLogo from "../../../client/images/moz-logo-1color-white-rgb-01.svg";
-import { SignInButton } from "../components/client/SignInButton";
-import { getL10n } from "../../functions/server/l10n";
-import { getServerSession } from "../../functions/server/getServerSession";
-import { PageLoadEvent } from "../../components/client/PageLoadEvent";
-import { getExperiments } from "../../functions/server/getExperiments";
-import { getEnabledFeatureFlags } from "../../../db/tables/featureFlags";
-import { getUserId } from "../../functions/server/getUserId";
-
-export type Props = {
-  children: ReactNode;
-};
-
-const GuestLayout = async (props: Props) => {
-  const l10n = getL10n();
-
-  // If the user is logged in, use UUID derived from FxA UID as Nimbus user ID.
-  const session = await getServerSession();
-  const userId = getUserId(session);
-
-  if (!userId) {
-    logger.error("No user ID for Nimbus telemetry");
-  }
-
-  try {
-    // TODO For initial A/A testing `features` is unused. https://mozilla-hub.atlassian.net/browse/MNTOR-2182
-    const features = await getExperiments(userId);
-    // TODO remove debug for A/A testing https://mozilla-hub.atlassian.net/browse/MNTOR-2182
-    logger.debug("Nimbus features in guest session:", features);
-  } catch (ex) {
-    logger.error("Could not fetch Nimbus features:", ex);
-  }
-
-  const enabledFlags = await getEnabledFeatureFlags({
-    email: session?.user.email ?? "",
-  });
-
-  return (
-    <>
-      <PageLoadEvent userId={userId} enabledFlags={enabledFlags} />
-      <header>
-        <div className="header-wrapper">
-          <a href="/">
-            <Image
-              className="monitor-logo"
-              src={MonitorLogo}
-              width="213"
-              height="33"
-              alt={l10n.getString("brand-mozilla-monitor")}
-              priority
-            />
-          </a>
-          <menu>
-            <li>
-              <SignInButton />
-            </li>
-          </menu>
-        </div>
-      </header>
-      <main>{props.children}</main>
-      <footer className="site-footer">
-        <a href="https://www.mozilla.org" target="_blank">
-          <Image
-            src={MozillaLogo}
-            width="100"
-            height="29"
-            loading="lazy"
-            alt={l10n.getString("mozilla")}
-          />
-        </a>
-        <menu>
-          <li>
-            <a href="/breaches">{l10n.getString("footer-nav-all-breaches")}</a>
-          </li>
-          <li>
-            <a
-              href="https://support.mozilla.org/kb/firefox-monitor-faq"
-              target="_blank"
-            >
-              FAQ
-            </a>
-          </li>
-          <li>
-            <a
-              href="https://www.mozilla.org/about/legal/terms/subscription-services/"
-              target="_blank"
-            >
-              {l10n.getString("terms-of-service")}
-            </a>
-          </li>
-          <li>
-            <a
-              href="https://www.mozilla.org/privacy/subscription-services/"
-              target="_blank"
-            >
-              {l10n.getString("privacy-notice")}
-            </a>
-          </li>
-          <li>
-            <a href="https://github.com/mozilla/blurts-server" target="_blank">
-              {l10n.getString("github")}
-            </a>
-          </li>
-        </menu>
-      </footer>
-    </>
-  );
-};
-
-export default GuestLayout;
diff --git a/src/app/deprecated/(guest)/page.tsx b/src/app/deprecated/(guest)/page.tsx
deleted file mode 100644
index 6d6ca0e6a..000000000
--- a/src/app/deprecated/(guest)/page.tsx
+++ /dev/null
@@ -1,168 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import Image from "next/image";
-import Script from "next/script";
-import "../../../client/css/partials/landing.css";
-import { getL10n } from "../../functions/server/l10n";
-
-import HeroImage from "../../../client/images/landing-hero@2x.webp";
-import LaptopImage from "../../../client/images/landing-laptop@2x.webp";
-import LockImage from "../../../client/images/landing-lock@2x.webp";
-import MailImage from "../../../client/images/landing-mail@2x.webp";
-import NaturePhoneImage from "../../../client/images/landing-nature-phone@2x.webp";
-import { getNonce } from "../functions/server/getNonce";
-
-export default function Home() {
-  const l10n = getL10n();
-
-  return (
-    <div data-partial="landing">
-      {/* These scripts predate the use of React and thus shouldn’t wait for
-      hydration to adjust the layout. */}
-      {/* eslint-disable @next/next/no-sync-scripts */}
-      <script
-        type="module"
-        src="/nextjs_migration/client/js/transitionObserver.js"
-        rel="preload"
-        crossOrigin="anonymous"
-        nonce={getNonce()}
-      />
-      <Script
-        type="module"
-        src="/nextjs_migration/client/js/landing.js"
-        nonce={getNonce()}
-      />
-      <section className="hero">
-        <div>
-          <h1>{l10n.getString("exposure-landing-hero-heading")}</h1>
-          <p>{l10n.getString("exposure-landing-hero-lead")}</p>
-          <form hidden className="exposure-scan">
-            <label htmlFor="scan-email-address" className="visually-hidden">
-              {l10n.getString("exposure-landing-hero-email-label")}
-            </label>
-            <input
-              id="scan-email-address"
-              name="email"
-              type="email"
-              placeholder={l10n.getString(
-                "exposure-landing-hero-email-placeholder",
-              )}
-              required
-            />
-            <button
-              type="submit"
-              className="button primary"
-              data-cta-id="exposure-landing-1"
-            >
-              {l10n.getString("exposure-landing-hero-cta-label")}
-            </button>
-          </form>
-        </div>
-        <figure>
-          <Image alt="" src={HeroImage} priority />
-        </figure>
-      </section>
-
-      <section className="why-use-monitor" data-enter-transition>
-        <h2>{l10n.getString("why-use-monitor")}</h2>
-        <p>{l10n.getString("identifying-breaches")}</p>
-        <ul>
-          <li>
-            <h3>{l10n.getString("protect-account")}</h3>
-            <p>{l10n.getString("protect-account-prevent-hackers")}</p>
-          </li>
-          <li>
-            <h3>{l10n.getString("prevent-fraud")}</h3>
-            <p>{l10n.getString("prevent-fraud-keep-info")}</p>
-          </li>
-          <li>
-            <h3>{l10n.getString("get-alerts")}</h3>
-            <p>{l10n.getString("get-alerts-find-out")}</p>
-          </li>
-        </ul>
-      </section>
-
-      <section className="how-it-works" data-enter-transition>
-        <h2>{l10n.getString("how-it-works")}</h2>
-        <ol>
-          <li>
-            <Image alt="" src={LaptopImage} />
-            <h3>{l10n.getString("check-for-breaches")}</h3>
-            <p>{l10n.getString("check-for-breaches-we-search")}</p>
-          </li>
-          <li>
-            <Image alt="" src={LockImage} />
-            <h3>{l10n.getString("protect-accounts")}</h3>
-            <p>{l10n.getString("protect-accounts-clear-steps")}</p>
-          </li>
-          <li>
-            <Image alt="" src={MailImage} />
-            <h3>{l10n.getString("alerts-for-breaches")}</h3>
-            <p>{l10n.getString("alerts-for-breaches-monitor-new")}</p>
-          </li>
-        </ol>
-      </section>
-
-      <section className="safe-with-us" data-enter-transition>
-        <div>
-          <h2>{l10n.getString("safe-with-us")}</h2>
-          <p>{l10n.getString("parent-company")}</p>
-          <p>{l10n.getString("our-mission")}</p>
-          <p>
-            <a href="https://www.mozilla.org/mission/" target="_blank">
-              {l10n.getString("learn-more-mission")}
-            </a>
-          </p>
-        </div>
-        <figure>
-          <Image alt="" src={NaturePhoneImage} />
-        </figure>
-      </section>
-
-      <section className="top-questions-about-monitor" data-enter-transition>
-        <div>
-          <h2>{l10n.getString("top-questions-about-monitor")}</h2>
-          <a
-            href="https://support.mozilla.org/kb/firefox-monitor-faq"
-            target="_blank"
-          >
-            {l10n.getString("see-all-faq")}
-          </a>
-        </div>
-        <div>
-          <details>
-            <summary>{l10n.getString("what-is-breach")}</summary>
-            <p>{l10n.getString("when-info-exposed")}</p>
-          </details>
-          <details>
-            <summary>{l10n.getString("what-do-i-do")}</summary>
-            <p>{l10n.getString("visit-monitor-to-learn")}</p>
-          </details>
-          <details>
-            <summary>{l10n.getString("what-gets-exposed")}</summary>
-            <p>{l10n.getString("depends-on-hackers")}</p>
-          </details>
-        </div>
-      </section>
-
-      <section className="see-if-data-breach" data-enter-transition>
-        <h2>{l10n.getString("see-if-data-breach")}</h2>
-        <a
-          className="button primary"
-          data-cta-id="landing-2"
-          href="/user/breaches"
-        >
-          {l10n.getString("get-started")}
-        </a>
-        <p
-          className="hibp-attribution"
-          dangerouslySetInnerHTML={{
-            __html: l10n.getString("hibp-footer-attribution"),
-          }}
-        />
-      </section>
-    </div>
-  );
-}
diff --git a/src/app/deprecated/(guest)/scan/page.tsx b/src/app/deprecated/(guest)/scan/page.tsx
deleted file mode 100644
index 2d85fc017..000000000
--- a/src/app/deprecated/(guest)/scan/page.tsx
+++ /dev/null
@@ -1,214 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import Script from "next/script";
-import "../../../../client/css/partials/exposureScan.css";
-import Image from "next/image";
-import HeroImage from "../../../../client/images/exposure-scan-hero.svg";
-import NoBreachesImage from "../../../../client/images/breaches-none.svg";
-import { getL10n } from "../../../functions/server/l10n";
-import { getNonce } from "../../functions/server/getNonce";
-
-export function generateMetadata() {
-  const l10n = getL10n();
-  return {
-    title: l10n.getString("breach-scan-meta-title"),
-  };
-}
-
-export default function PublicScan() {
-  const l10n = getL10n();
-
-  return (
-    <div data-partial="exposureScan">
-      <Script
-        type="module"
-        src="/nextjs_migration/client/js/scan.js"
-        nonce={getNonce()}
-      />
-      <div hidden id="data"></div>
-      <div id="exposure-scan-loading">
-        {l10n.getString("exposure-landing-result-loading")}
-      </div>
-      <div hidden id="exposure-scan-error" aria-live="polite">
-        {l10n.getString("exposure-landing-result-error")}
-      </div>
-      <template
-        id="breach-template"
-        dangerouslySetInnerHTML={{
-          __html: `
-          <li class="exposure-scan-breach">
-            <h3>
-              ${
-                /* The company logo and name will be added client-side, after running the scan */ ""
-              }
-              <span class="exposure-scan-breach-company-logo"></span>
-              <span class="exposure-scan-breach-company-name"></span>
-            </h3>
-            <div class="exposure-scan-breach-main">
-              <dl>
-                <div class="exposure-scan-breach-added">
-                  <dt>${l10n.getString(
-                    "exposure-landing-result-card-added",
-                  )}</dt>
-                  ${
-                    /* The added date will be added client-side, after running the scan */ ""
-                  }
-                  <dd></dd>
-                </div>
-                <div class="exposure-scan-breach-data">
-                  <dt>${l10n.getString(
-                    "exposure-landing-result-card-data",
-                  )}</dt>
-                  ${
-                    /* The breached data will be added client-side, after running the scan */ ""
-                  }
-                  <dd></dd>
-                </div>
-              </dl>
-            </div>
-          </li>
-        `,
-        }}
-      />
-      <div
-        hidden
-        id="exposure-scan-results-overflow"
-        className="exposure-scan-results"
-        aria-live="polite"
-      >
-        <header className="exposure-scan-hero">
-          <div className="exposure-scan-hero-content">
-            <p>
-              {l10n.getString("exposure-landing-result-overflow-hero-lead")}
-            </p>
-            <a
-              href="/user/breaches"
-              data-cta-id="exposure-landing-result-overflow-cta-hero"
-              className="button primary"
-            >
-              {l10n.getString(
-                "exposure-landing-result-overflow-hero-cta-label",
-              )}
-            </a>
-          </div>
-          <Image alt="" src={HeroImage} />
-        </header>
-        <ul className="exposure-scan-breaches"></ul>
-        <footer className="exposure-scan-footer">
-          <a
-            href="/user/breaches"
-            data-cta-id="exposure-landing-result-overflow-cta-footer"
-            className="button primary"
-          >
-            {l10n.getString(
-              "exposure-landing-result-overflow-footer-cta-label",
-            )}
-          </a>
-          <p
-            className="hibp-attribution"
-            dangerouslySetInnerHTML={{
-              __html: l10n
-                .getString("exposure-landing-result-footer-attribution")
-                .replace(
-                  "<hibp-link>",
-                  '<a href="https://haveibeenpwned.com/" target="_blank">',
-                )
-                .replace("</hibp-link>", "</a>"),
-            }}
-          />
-        </footer>
-      </div>
-      <div
-        hidden
-        id="exposure-scan-results-some"
-        className="exposure-scan-results"
-        aria-live="polite"
-      >
-        <header className="exposure-scan-hero">
-          <div className="exposure-scan-hero-content">
-            <p>{l10n.getString("exposure-landing-result-some-hero-lead")}</p>
-            <a
-              href="/user/breaches"
-              data-cta-id="exposure-landing-result-some-cta-hero"
-              className="button primary"
-            >
-              {l10n.getString("exposure-landing-result-some-hero-cta-label")}
-            </a>
-          </div>
-          <Image alt="" src={HeroImage} />
-        </header>
-        <ul className="exposure-scan-breaches"></ul>
-        <footer className="exposure-scan-footer">
-          <a
-            href="/user/breaches"
-            data-cta-id="exposure-landing-result-some-cta-footer"
-            className="button primary"
-          >
-            {l10n.getString("exposure-landing-result-some-footer-cta-label")}
-          </a>
-          <p
-            className="hibp-attribution"
-            dangerouslySetInnerHTML={{
-              __html: l10n
-                .getString("exposure-landing-result-footer-attribution")
-                .replace(
-                  "<hibp-link>",
-                  '<a href="https://haveibeenpwned.com/" target="_blank">',
-                )
-                .replace("</hibp-link>", "</a>"),
-            }}
-          />
-        </footer>
-      </div>
-      <div
-        hidden
-        id="exposure-scan-results-none"
-        className="exposure-scan-results"
-        aria-live="polite"
-      >
-        <header className="exposure-scan-hero">
-          <div className="exposure-scan-hero-content">
-            <p>{l10n.getString("exposure-landing-result-none-hero-lead")}</p>
-            <a
-              href="/user/breaches"
-              data-cta-id="exposure-landing-result-none-cta-hero"
-              className="button primary"
-            >
-              {l10n.getString("exposure-landing-result-none-hero-cta-label")}
-            </a>
-          </div>
-          <Image alt="" src={HeroImage} />
-        </header>
-        <div className="exposure-scan-breaches">
-          <div className="exposure-scan-breach">
-            <Image alt="" src={NoBreachesImage} />
-            {l10n.getString("exposure-landing-result-card-nothing")}
-          </div>
-        </div>
-        <footer className="exposure-scan-footer">
-          <a
-            href="/user/breaches"
-            data-cta-id="exposure-landing-result-none-cta-footer"
-            className="button primary"
-          >
-            {l10n.getString("exposure-landing-result-none-footer-cta-label")}
-          </a>
-          <p
-            className="hibp-attribution"
-            dangerouslySetInnerHTML={{
-              __html: l10n
-                .getString("exposure-landing-result-footer-attribution")
-                .replace(
-                  "<hibp-link>",
-                  '<a href="https://haveibeenpwned.com/" target="_blank">',
-                )
-                .replace("</hibp-link>", "</a>"),
-            }}
-          />
-        </footer>
-      </div>
-    </div>
-  );
-}
diff --git a/src/app/deprecated/(guest)/user/unsubscribe-monthly/page.tsx b/src/app/deprecated/(guest)/user/unsubscribe-monthly/page.tsx
deleted file mode 100644
index 257f01f49..000000000
--- a/src/app/deprecated/(guest)/user/unsubscribe-monthly/page.tsx
+++ /dev/null
@@ -1,34 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { redirect } from "next/navigation";
-import { updateMonthlyEmailOptout } from "../../../../../db/tables/subscribers";
-import { getL10n } from "../../../../functions/server/l10n";
-
-export default async function UnsubscribeMonthly(props: {
-  searchParams: { [key: string]: string | string[] | undefined };
-}) {
-  const token = props.searchParams.token;
-  if (typeof token !== "string") {
-    return redirect("/");
-  }
-  try {
-    await updateMonthlyEmailOptout(token);
-  } catch (error) {
-    console.log(error);
-    return redirect("/");
-  }
-  const l10n = getL10n();
-
-  return (
-    <div data-partial="unsubscribeMonthly">
-      <section className="unsubscribe">
-        <h1
-          dangerouslySetInnerHTML={{ __html: l10n.getString("unsub-headline") }}
-        />
-        <p>{l10n.getString("changes-saved")}</p>
-      </section>
-    </div>
-  );
-}
diff --git a/src/app/deprecated/components/client/FalseDoorBanner.module.scss b/src/app/deprecated/components/client/FalseDoorBanner.module.scss
deleted file mode 100644
index 070a8e143..000000000
--- a/src/app/deprecated/components/client/FalseDoorBanner.module.scss
+++ /dev/null
@@ -1,116 +0,0 @@
-@import "../../../tokens";
-
-.falseDoorTestWrapper {
-  font: $text-body-md;
-  position: fixed;
-  bottom: 0;
-  left: 0;
-  // Overlap all regular content on the site with a z-index,
-  // except for ModalOverlay which, at the time of writing, has a z-index of 2
-  z-index: 1;
-  width: 100%;
-  background-color: #ffdff0;
-  display: flex;
-  flex-direction: row;
-  justify-content: space-between;
-  gap: $spacing-xl;
-  padding-inline: $spacing-sm;
-  padding-block: $spacing-md;
-
-  @media screen and (min-width: $screen-lg) {
-    padding-inline: $spacing-2xl;
-    padding-block: $spacing-md;
-  }
-
-  .dismiss {
-    right: $spacing-sm;
-    position: absolute;
-    color: $color-grey-40;
-
-    @media screen and (min-width: $screen-lg) {
-      align-self: flex-start;
-      margin-left: auto;
-      position: static;
-      right: 0;
-    }
-
-    &:focus {
-      border: 1px solid $color-informational-active;
-      outline: $border-focus-width solid $color-informational-focus;
-    }
-  }
-
-  .content {
-    display: flex;
-    flex-wrap: wrap;
-    align-items: center;
-    gap: $spacing-md;
-    width: 100%;
-    justify-content: center;
-    padding-block: $spacing-sm;
-    padding-inline: $spacing-sm;
-    text-align: center;
-
-    @media screen and (min-width: $screen-sm) {
-      padding-inline: $spacing-xl;
-    }
-
-    @media screen and (min-width: $screen-md) {
-      display: grid;
-      text-align: start;
-      grid-template-columns: 1fr 3fr 1fr;
-      padding-inline: $spacing-lg;
-
-      @media screen and (min-width: $screen-xl) {
-        gap: $spacing-lg;
-        padding: $spacing-sm $layout-2xl;
-      }
-    }
-
-    .logoWrapper {
-      display: flex;
-      align-items: center;
-      justify-content: center;
-      width: 100%;
-
-      @media screen and (min-width: $screen-md) {
-        width: auto;
-      }
-
-      @media screen and (min-width: $screen-lg) {
-        padding-inline: $spacing-xl;
-      }
-
-      .logo {
-        max-width: 200px; // Width of the Mozilla Monitor logo
-      }
-    }
-
-    p {
-      margin: 0;
-    }
-
-    .cta {
-      text-decoration: none;
-      padding-inline: $spacing-xl;
-      padding-block: $spacing-sm;
-      background: $color-blue-50;
-      font-weight: 600;
-      justify-content: center;
-      color: $color-white;
-      border-radius: $border-radius-xs;
-      cursor: pointer;
-      text-align: center;
-      width: 150px; // Width of the CTA
-
-      &:focus {
-        outline: $border-focus-width solid $color-blue-30;
-      }
-
-      @media screen and (min-width: $screen-lg) {
-        margin-left: auto;
-        width: 200px; // Width of the CTA
-      }
-    }
-  }
-}
diff --git a/src/app/deprecated/components/client/FalseDoorBanner.stories.ts b/src/app/deprecated/components/client/FalseDoorBanner.stories.ts
deleted file mode 100644
index 6d0eaa4a7..000000000
--- a/src/app/deprecated/components/client/FalseDoorBanner.stories.ts
+++ /dev/null
@@ -1,28 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import type { Meta, StoryObj } from "@storybook/react";
-import { FalseDoorBanner } from "./FalseDoorBanner";
-
-// More on how to set up stories at: https://storybook.js.org/docs/react/writing-stories/introduction
-const meta: Meta<typeof FalseDoorBanner> = {
-  title: "False Door Banner",
-  component: FalseDoorBanner,
-};
-export default meta;
-type Story = StoryObj<typeof FalseDoorBanner>;
-
-export const FalseDoorBannerDashboard: Story = {
-  args: {
-    checkIsOnDashboard: true,
-    link: "example.com",
-  },
-};
-
-export const FalseDoorBannerDefault: Story = {
-  args: {
-    checkIsOnDashboard: false,
-    link: "example.com",
-  },
-};
diff --git a/src/app/deprecated/components/client/FalseDoorBanner.test.tsx b/src/app/deprecated/components/client/FalseDoorBanner.test.tsx
deleted file mode 100644
index 6eec72ca1..000000000
--- a/src/app/deprecated/components/client/FalseDoorBanner.test.tsx
+++ /dev/null
@@ -1,33 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { render, screen } from "@testing-library/react";
-import { it, expect } from "@jest/globals";
-import { composeStory } from "@storybook/react";
-import Meta, {
-  FalseDoorBannerDashboard,
-  FalseDoorBannerDefault,
-} from "./FalseDoorBanner.stories";
-
-it("shows false door test variant on dashboard", () => {
-  const ComposedFalseDoorBanner = composeStory(FalseDoorBannerDashboard, Meta);
-  render(<ComposedFalseDoorBanner />);
-  // substring match https://testing-library.com/docs/queries/about/#textmatch
-  const bannerElem = screen.getByText(
-    "Automatically remove data from broker sites with",
-    { exact: false },
-  );
-  expect(bannerElem).toBeInTheDocument();
-});
-
-it("shows false door test", () => {
-  const ComposedFalseDoorBanner = composeStory(FalseDoorBannerDefault, Meta);
-  render(<ComposedFalseDoorBanner />);
-  // substring match https://testing-library.com/docs/queries/about/#textmatch
-  const bannerElem = screen.getByText(
-    "Automatically remove data from sketchy sites with",
-    { exact: false },
-  );
-  expect(bannerElem).toBeInTheDocument();
-});
diff --git a/src/app/deprecated/components/client/FalseDoorBanner.tsx b/src/app/deprecated/components/client/FalseDoorBanner.tsx
deleted file mode 100644
index c8f707b82..000000000
--- a/src/app/deprecated/components/client/FalseDoorBanner.tsx
+++ /dev/null
@@ -1,138 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use client";
-
-import Image from "next/image";
-import MozillaMonitorLogo from "../../../(proper_react)/images/monitor-logo.webp";
-import styles from "./FalseDoorBanner.module.scss";
-import { CloseBtn } from "../../../components/server/Icons";
-import { useEffect, useState } from "react";
-import { useCookies } from "react-cookie";
-import { useL10n } from "../../../hooks/l10n";
-import Link from "next/link";
-import { usePathname } from "next/navigation";
-import { appendUtmParams } from "../../../../utils/utmParams";
-
-type HandleFalseDoorBanner = {
-  link: string;
-};
-
-// Ignoring full coverage here because we'll be creating a custom cookies hook
-// TODO: MNTOR-2043
-/* c8 ignore start */
-export const HandleFalseDoorTest = (props: HandleFalseDoorBanner) => {
-  const [cookies, setCookie] = useCookies(["falseDoorDismissedPhase3"]);
-  const [shouldShowFalseDoor, setShouldShowFalseDoor] = useState(false);
-  const pathname = usePathname();
-  const isOnDashboard = pathname === "/user/breaches";
-
-  const waitlistLink = appendUtmParams({
-    linkUrl: props.link,
-    utmParams: {
-      utm_source: "monitor",
-      utm_medium: "monitor-product",
-      utm_content: `banner-phase-3-us_${pathname}`,
-    },
-  });
-
-  const handleDismiss = (event?: Event) => {
-    setCookie("falseDoorDismissedPhase3", "true", { path: "/" });
-    if (event && event.target && "id" in event.target) {
-      let action;
-      if (event?.target.id === "close-button") {
-        action = "dismissed";
-      } else {
-        action = "opened";
-      }
-      window.gtag("event", "clicked_false_door", {
-        action,
-        result: "success",
-        page_location: location.href,
-      });
-    }
-  };
-
-  useEffect(() => {
-    setShouldShowFalseDoor(!cookies.falseDoorDismissedPhase3);
-  }, [cookies.falseDoorDismissedPhase3]);
-
-  return (
-    <>
-      {shouldShowFalseDoor && (
-        <FalseDoorBanner
-          checkIsOnDashboard={isOnDashboard}
-          link={waitlistLink}
-          onDismiss={handleDismiss}
-        />
-      )}
-    </>
-  );
-};
-
-type FalseDoorBanner = {
-  onDismiss?: () => void;
-  checkIsOnDashboard: boolean;
-  link: string;
-};
-export const FalseDoorBanner = (props: FalseDoorBanner) => {
-  const l10n = useL10n();
-  const [isLargeScreen, setIsLargeScreen] = useState(false);
-
-  const handleResize = () => {
-    // 1024px is equivalent to $screen-lg
-    if (window.innerWidth > 1024) {
-      setIsLargeScreen(true);
-    } else {
-      setIsLargeScreen(false);
-    }
-  };
-
-  useEffect(() => {
-    window.addEventListener("resize", handleResize);
-  });
-
-  const content = (
-    <p>
-      {l10n.getString("false-door-test-phase-3-content-part-one")}
-      {isLargeScreen ? <br /> : " "}
-      {props.checkIsOnDashboard
-        ? l10n.getString("false-door-test-phase-3-content-part-two-dashboard")
-        : l10n.getString("false-door-test-phase-3-content-part-two")}
-    </p>
-  );
-  /* c8 ignore stop */
-
-  return (
-    <div className={styles.falseDoorTestWrapper}>
-      <div className={styles.content}>
-        <span className={styles.logoWrapper}>
-          <Image src={MozillaMonitorLogo} alt="" className={styles.logo} />
-        </span>
-        {content}
-        <Link
-          id="open-button"
-          className={styles.cta}
-          target="_blank"
-          href={props.link}
-          data-cta-id="false-door"
-          onClick={props.onDismiss}
-        >
-          {l10n.getString("false-door-test-cta")}
-        </Link>
-      </div>
-      <button
-        id="close-button"
-        className={styles.dismiss}
-        onClick={props.onDismiss}
-      >
-        <CloseBtn
-          alt={l10n.getString("false-door-test-popup-close")}
-          width="15"
-          height="15"
-        />
-      </button>
-    </div>
-  );
-};
diff --git a/src/app/deprecated/components/client/SignInButton.tsx b/src/app/deprecated/components/client/SignInButton.tsx
deleted file mode 100644
index 9162580d3..000000000
--- a/src/app/deprecated/components/client/SignInButton.tsx
+++ /dev/null
@@ -1,44 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use client";
-
-import { signIn } from "next-auth/react";
-import { usePathname } from "next/navigation";
-import { useL10n } from "../../../hooks/l10n";
-import { useEffect } from "react";
-
-export type Props = {
-  autoSignIn?: boolean;
-};
-
-function initSignIn(callbackUrl: string) {
-  void signIn("fxa", { callbackUrl });
-}
-
-export const SignInButton = ({ autoSignIn }: Props) => {
-  const l10n = useL10n();
-  const pathname = usePathname();
-  const callbackUrl = pathname === "/" ? "/user/breaches" : pathname;
-
-  useEffect(() => {
-    if (autoSignIn) {
-      initSignIn(callbackUrl);
-    }
-  }, [autoSignIn, callbackUrl]);
-
-  if (autoSignIn) {
-    return null;
-  }
-
-  return (
-    <button
-      onClick={() => initSignIn(callbackUrl)}
-      data-cta-id="sign-in-1"
-      className="button secondary"
-    >
-      {l10n.getString("sign-in")}
-    </button>
-  );
-};
diff --git a/src/app/deprecated/components/client/SiteNavigation.tsx b/src/app/deprecated/components/client/SiteNavigation.tsx
deleted file mode 100644
index 60b3d8750..000000000
--- a/src/app/deprecated/components/client/SiteNavigation.tsx
+++ /dev/null
@@ -1,110 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use client";
-
-import Image from "next/image";
-import { usePathname } from "next/navigation";
-import { useL10n } from "../../../hooks/l10n";
-
-import RelayLogo from "../../../../client/images/logo-relay.svg";
-import VPNLogo from "../../../../client/images/logo-vpn.svg";
-
-export const SiteNavigation = () => {
-  const l10n = useL10n();
-  const pathname = usePathname();
-
-  const isBreachesPage = pathname === "/user/breaches";
-  const isSettingsPage = pathname === "/user/settings";
-
-  return (
-    <nav className="site-nav">
-      <div className="pages-nav">
-        <a
-          href="/user/breaches"
-          className={`nav-item ${isBreachesPage ? "current" : ""}`}
-        >
-          <svg
-            width="24"
-            height="24"
-            viewBox="0 0 24 24"
-            fill="none"
-            xmlns="http://www.w3.org/2000/svg"
-          >
-            <path
-              fillRule="evenodd"
-              clipRule="evenodd"
-              d="M10.5942 20.049C9.87439 21.3816 10.8394 22.9996 12.3539 22.9996H19.657C21.1692 22.9996 22.1344 21.3862 21.4193 20.0538L17.7796 13.2724C17.0264 11.8689 15.0148 11.8662 14.2577 13.2676L10.5942 20.049Z"
-              fill="white"
-              stroke="currentcolor"
-              strokeWidth="2"
-              strokeLinecap="round"
-              strokeLinejoin="round"
-            />
-            <path
-              fillRule="evenodd"
-              clipRule="evenodd"
-              d="M16 21C16.5523 21 17 20.5523 17 20C17 19.4477 16.5523 19 16 19C15.4477 19 15 19.4477 15 20C15 20.5523 15.4477 21 16 21Z"
-              fill="currentcolor"
-            />
-            <path
-              d="M16 17V16"
-              stroke="currentcolor"
-              strokeWidth="2"
-              strokeLinecap="round"
-            />
-            <path
-              d="M7 22H5C3.89543 22 3 21.1046 3 20V11C3 9.89543 3.89543 9 5 9H19C20.1046 9 21 9.89543 21 11V13"
-              stroke="currentcolor"
-              strokeWidth="2"
-              strokeLinecap="round"
-              strokeLinejoin="round"
-            />
-            <path
-              d="M7 9V7C7 4.23858 9.23858 2 12 2C14.7614 2 17 4.23858 17 7V9"
-              stroke="currentcolor"
-              strokeWidth="2"
-              strokeLinecap="round"
-              strokeLinejoin="round"
-            />
-          </svg>
-          {l10n.getString("site-nav-breaches-link")}
-        </a>
-      </div>
-
-      <div className="meta-nav">
-        <a
-          href="/user/settings"
-          className={`nav-item ${isSettingsPage ? "current" : ""}`}
-        >
-          {l10n.getString("site-nav-settings-link")}
-        </a>
-
-        <a
-          target="_blank"
-          href="https://support.mozilla.org/kb/firefox-monitor"
-          className="nav-item"
-        >
-          {l10n.getString("site-nav-help-link")}
-        </a>
-      </div>
-
-      <div className="callouts">
-        <p>{l10n.getString("site-nav-ad-callout")}</p>
-        <a
-          href="https://relay.firefox.com/?utm_medium=mozilla-websites&utm_source=monitor&utm_campaign=&utm_content=nav-bar-global"
-          target="_blank"
-        >
-          <Image alt={l10n.getString("brand-relay")} src={RelayLogo} />
-        </a>
-        <a
-          href="https://www.mozilla.org/products/vpn?utm_medium=mozilla-websites&utm_source=monitor&utm_campaign=&utm_content=nav-bar-global"
-          target="_blank"
-        >
-          <Image alt={l10n.getString("brand-mozilla-vpn")} src={VPNLogo} />
-        </a>
-      </div>
-    </nav>
-  );
-};
diff --git a/src/app/deprecated/components/client/UserMenu.tsx b/src/app/deprecated/components/client/UserMenu.tsx
deleted file mode 100644
index 237380965..000000000
--- a/src/app/deprecated/components/client/UserMenu.tsx
+++ /dev/null
@@ -1,104 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use client";
-
-import { Session } from "next-auth";
-import Image from "next/image";
-import { signOut } from "next-auth/react";
-import Script from "next/script";
-
-import { useL10n } from "../../../hooks/l10n";
-import OpenInIcon from "../../../../client/images/icon-open-in.svg";
-import SettingsIcon from "../../../../client/images/icon-settings.svg";
-import HelpIcon from "../../../../client/images/icon-help.svg";
-import SignOutIcon from "../../../../client/images/icon-signout.svg";
-import { FeatureFlagName } from "../../../../db/tables/featureFlags";
-
-export type Props = {
-  session: Session;
-  fxaSettingsUrl: string;
-  nonce: string | undefined;
-  enabledFeatureFlags: FeatureFlagName[];
-};
-
-export const UserMenu = ({
-  session,
-  fxaSettingsUrl,
-  nonce,
-  enabledFeatureFlags,
-}: Props) => {
-  const l10n = useL10n();
-  if (!session) {
-    return null;
-  }
-
-  return (
-    <div className="user-menu-wrapper" tabIndex={-1}>
-      <Script
-        type="module"
-        src="/nextjs_migration/client/js/userMenu.js"
-        nonce={nonce}
-      />
-      <button
-        aria-expanded="false"
-        aria-haspopup="true"
-        className="user-menu-button"
-        title={l10n.getString("menu-button-title")}
-      >
-        {/* The avatar is an SVG, which next/image doesn't process: https://nextjs.org/docs/pages/api-reference/components/image#dangerouslyallowsvg */}
-        {/* eslint-disable-next-line @next/next/no-img-element */}
-        <img
-          // The avatar should always be provided by FxA
-          // eslint-disable-next-line @typescript-eslint/no-non-null-asserted-optional-chain
-          src={session.user?.fxa?.avatar}
-          alt={l10n.getString("menu-button-alt")}
-          height={46}
-        />
-      </button>
-      <menu
-        aria-label={l10n.getString("menu-list-accessible-label")}
-        className="user-menu-container user-menu-popover"
-        role="navigation"
-        hidden
-      >
-        <li tabIndex={1}>
-          <a href={fxaSettingsUrl} target="_blank" className="user-menu-header">
-            <b className="user-menu-email">{session.user?.email}</b>
-            <div className="user-menu-subtitle">
-              {l10n.getString("menu-item-fxa-2")}
-              <Image alt="" src={OpenInIcon} />
-            </div>
-          </a>
-          <hr />
-        </li>
-        <li>
-          <a href="/user/settings" className="user-menu-link">
-            <Image alt="" src={SettingsIcon} />
-            {l10n.getString("menu-item-settings")}
-          </a>
-        </li>
-        <li>
-          <a
-            href="https://support.mozilla.org/kb/firefox-monitor"
-            target="_blank"
-            className="user-menu-link"
-          >
-            <Image alt="" src={HelpIcon} />
-            {l10n.getString("menu-item-help")}
-          </a>
-        </li>
-        <li>
-          <button
-            onClick={() => void signOut({ callbackUrl: "/" })}
-            className="user-menu-link"
-          >
-            <Image alt="" src={SignOutIcon} />
-            {l10n.getString("menu-item-logout")}
-          </button>
-        </li>
-      </menu>
-    </div>
-  );
-};
diff --git a/src/app/deprecated/components/client/assets/shield-icon.svg b/src/app/deprecated/components/client/assets/shield-icon.svg
deleted file mode 100644
index 0b67bd26a..000000000
--- a/src/app/deprecated/components/client/assets/shield-icon.svg
+++ /dev/null
@@ -1,5 +0,0 @@
-<svg width="70" height="72" viewBox="0 0 70 72" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path fill-rule="evenodd" clip-rule="evenodd" d="M15.5288 16.8559C15.113 27.7003 15.7061 36.4495 18.3751 43.3568C21.0322 50.2333 25.8731 55.5922 34.8519 59.2261C43.8307 55.5922 48.6715 50.2333 51.3287 43.3568C53.9976 36.4495 54.5907 27.7003 54.175 16.8559L34.8519 11.8552L15.5288 16.8559ZM34.8519 7.74902L11.7785 13.7203C10.4967 38.2691 13.3168 55.5196 34.8519 63.4814C56.387 55.5196 59.2071 38.2691 57.9253 13.7203L34.8519 7.74902Z" fill="#E21587"/>
-<path d="M15.4043 16.3722L15.0442 16.4654L15.03 16.8371C14.6137 27.6957 15.2021 36.5305 17.9095 43.5373C20.619 50.5495 25.565 56.0069 34.6651 59.6899L34.8527 59.7658L35.0403 59.6899C44.1404 56.0069 49.0863 50.5495 51.7959 43.5373C54.5033 36.5305 55.0917 27.6957 54.6754 16.8371L54.6612 16.4654L54.3011 16.3722L34.978 11.3714L34.8527 11.339L34.7274 11.3714L15.4043 16.3722Z" fill="#E21587" stroke="#E21587"/>
-<path d="M27.1211 32.8427L32.7565 38.4781C33.1892 38.9109 33.9056 38.8569 34.2687 38.3642L44.8798 23.9634" stroke="#FFDFF0" stroke-width="2.5" stroke-linecap="round"/>
-</svg>
diff --git a/src/app/deprecated/components/client/assets/shield-outline-icon.svg b/src/app/deprecated/components/client/assets/shield-outline-icon.svg
deleted file mode 100644
index dddeedff9..000000000
--- a/src/app/deprecated/components/client/assets/shield-outline-icon.svg
+++ /dev/null
@@ -1,4 +0,0 @@
-<svg width="70" height="69" viewBox="0 0 70 69" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path fill-rule="evenodd" clip-rule="evenodd" d="M15.5288 16.1067C15.113 26.4691 15.7061 34.8295 18.3751 41.4297C21.0322 48.0007 25.8731 53.1213 34.8519 56.5938C43.8307 53.1213 48.6715 48.0007 51.3287 41.4297C53.9976 34.8295 54.5907 26.4691 54.175 16.1067L34.8519 11.3282L15.5288 16.1067ZM34.8519 7.40454L11.7785 13.1105C10.4967 36.5682 13.3168 53.052 34.8519 60.6599C56.387 53.052 59.2071 36.5682 57.9253 13.1105L34.8519 7.40454Z" fill="#E21587"/>
-<path d="M27.1211 33.2614L32.7565 38.8968C33.1892 39.3296 33.9056 39.2756 34.2687 38.7829L44.8798 24.3821" stroke="#E21587" stroke-width="2.5" stroke-linecap="round"/>
-</svg>
diff --git a/src/app/deprecated/components/server/AddEmailDialog.tsx b/src/app/deprecated/components/server/AddEmailDialog.tsx
deleted file mode 100644
index 837d7678c..000000000
--- a/src/app/deprecated/components/server/AddEmailDialog.tsx
+++ /dev/null
@@ -1,63 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import React from "react";
-import cloudImage from "../../../../client/images/dialog-email-clouds.svg";
-import AppConstants from "../../../../appConstants";
-import { getL10n } from "../../../functions/server/l10n";
-import { CONST_MAX_NUM_ADDRESSES } from "../../../../constants";
-
-export default function AddEmailDialog() {
-  const l10n = getL10n();
-  const emailLimit = CONST_MAX_NUM_ADDRESSES;
-
-  return (
-    <>
-      {/* Styles need to be included manually when fetching the component via API */}
-      {/* eslint-disable-next-line @next/next/no-css-tags */}
-      <link rel="stylesheet" href="/nextjs_migration/client/css/addEmail.css" />
-      <header>
-        <button className="close"></button>
-        {/* We can’t use next/image when we fetch the component via API */}
-        {/* eslint-disable-next-line @next/next/no-img-element */}
-        <img src={cloudImage.src} alt="" />
-        <h2>{l10n.getString("add-email-add-another-heading")}</h2>
-      </header>
-      <form>
-        <p>
-          {l10n.getString("add-email-your-account-includes", {
-            total: emailLimit,
-          })}
-        </p>
-        <label className="text-field">
-          <span>{l10n.getString("add-email-address-input-label")}</span>
-          <input type="email" name="email-address" required />
-        </label>
-        <button className="primary" type="submit" name="email-submit">
-          {l10n.getString("add-email-send-verification-button")}
-        </button>
-      </form>
-      <template
-        data-success
-        dangerouslySetInnerHTML={{
-          __html: `
-        <p class="add-email-success">
-          ${l10n
-            .getString("add-email-verify-the-link", {
-              email: '<b class="current-email"></b>',
-              "settings-href": 'href="/user/settings"',
-            })
-            // The following are special characters inserted by Fluent,
-            // which break the link when inserted into the tag.
-            // (For future strings, we can just `getElement` to properly insert
-            // tags into localised strings.)
-            .replaceAll("⁩", "")
-            .replaceAll("⁨", "")}
-        </p>
-      `,
-        }}
-      />
-    </>
-  );
-}
diff --git a/src/app/deprecated/components/server/BreachesTable.tsx b/src/app/deprecated/components/server/BreachesTable.tsx
deleted file mode 100644
index bf9843548..000000000
--- a/src/app/deprecated/components/server/BreachesTable.tsx
+++ /dev/null
@@ -1,228 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import type { UserBreaches } from "../../../functions/server/getUserBreaches";
-import { getL10n } from "../../../functions/server/l10n";
-import { BreachLogo } from "../../../components/server/BreachLogo";
-import { getLocale } from "../../../../utils/fluent.js";
-
-import ImageBreachesNone from "../../../../client/images/breaches-none.svg";
-import ImageBreachesAllResolved from "../../../../client/images/breaches-all-resolved.svg";
-import { HibpLikeDbBreach } from "../../../../utils/hibp";
-import { Breach } from "../../(authenticated)/user/breaches/breaches";
-
-function createResolveSteps(breach: any) {
-  const checkedArr = breach.ResolutionsChecked || [];
-  const resolveStepsHTML = Object.entries(breach.breachChecklist).map(
-    ([key, value]: [string, any]) => `
-    <li class="resolve-list-item">
-      <input name="${breach.Id as string}" value="${key}" type="checkbox" ${
-        checkedArr.includes(key) ? "checked" : ""
-      }>
-      <p>${value.header as string}<br><i>${value.body as string}</i></p>
-    </li>
-   `,
-  );
-
-  return resolveStepsHTML.join("");
-}
-
-export type Props = {
-  userBreaches: UserBreaches;
-};
-
-export const BreachesTable = ({ userBreaches }: Props) => {
-  const l10n = getL10n();
-
-  function createBreachRows({ breachesData }: UserBreaches) {
-    const locale = getLocale();
-    const shortDate = new Intl.DateTimeFormat(locale, {
-      year: "numeric",
-      month: "2-digit",
-      day: "2-digit",
-      timeZone: "UTC",
-    });
-    const shortList = new Intl.ListFormat(locale, { style: "narrow" });
-    const longDate = new Intl.DateTimeFormat(locale, {
-      dateStyle: "long",
-      timeZone: "UTC",
-    });
-    const longList = new Intl.ListFormat(locale, { style: "long" });
-    const breachRowsHTML = breachesData.verifiedEmails.flatMap((account) => {
-      return account.breaches.map((breach: HibpLikeDbBreach | Breach) => {
-        const isHidden = !account.primary || (breach as Breach).IsResolved; // initial breach hidden state
-        const status = (breach as Breach).IsResolved
-          ? "resolved"
-          : "unresolved";
-        const breachDate = Date.parse(breach.BreachDate);
-        const addedDate = Date.parse((breach as Breach).AddedDate);
-        const dataClassesTranslated = breach.DataClasses.map((item) =>
-          l10n.getString(item),
-        );
-        const description = l10n.getString("breach-description", {
-          companyName: breach.Title,
-          breachDate: longDate.format(breachDate),
-          addedDate: longDate.format(addedDate),
-          dataClasses: longList.format(dataClassesTranslated),
-        });
-
-        return (
-          <details
-            key={breach.Name + account.email}
-            className="breach-row"
-            data-status={status}
-            data-email={account.email}
-            data-classes={dataClassesTranslated}
-            hidden={isHidden}
-          >
-            <summary>
-              <span className="breach-company">
-                <BreachLogo breach={breach as HibpLikeDbBreach} htmlTags />{" "}
-                {breach.Title}
-              </span>
-              <span>{shortList.format(dataClassesTranslated)}</span>
-              <span>
-                <span className="resolution-badge is-resolved">
-                  {l10n.getString("column-status-badge-resolved")}
-                </span>
-                <span className="resolution-badge is-active">
-                  {l10n.getString("column-status-badge-active")}
-                </span>
-              </span>
-              <span>{shortDate.format(addedDate)}</span>
-            </summary>
-            <article>
-              <p>{description}</p>
-              <p>
-                <strong>{l10n.getString("breaches-resolve-heading")}</strong>
-              </p>
-              <ol
-                className="resolve-list"
-                dangerouslySetInnerHTML={{ __html: createResolveSteps(breach) }}
-              />
-            </article>
-          </details>
-        );
-      });
-    });
-
-    return breachRowsHTML;
-  }
-
-  return (
-    <>
-      <fieldset className="breaches-filter">
-        <input
-          id="breaches-unresolved"
-          type="radio"
-          name="breaches-status"
-          value="unresolved"
-          autoComplete="off"
-        />
-        <label htmlFor="breaches-unresolved">
-          {/* The DOM for this element is modified by regular JavaScript files
-          that predate our migration to Next.js. We don’t use any React-specific
-          features here, so hydration errors should not be a problem. */}
-          <output suppressHydrationWarning>&nbsp;</output>
-          {l10n.getString("filter-label-unresolved")}
-        </label>
-        <input
-          id="breaches-resolved"
-          type="radio"
-          name="breaches-status"
-          value="resolved"
-          autoComplete="off"
-        />
-        <label htmlFor="breaches-resolved">
-          {/* The DOM for this element is modified by regular JavaScript files
-          that predate our migration to Next.js. We don’t use any React-specific
-          features here, so hydration errors should not be a problem. */}
-          <output suppressHydrationWarning>&nbsp;</output>
-          {l10n.getString("filter-label-resolved")}
-        </label>
-      </fieldset>
-      {/* The DOM for this element is modified by regular JavaScript files
-      that predate our migration to Next.js. We don’t use any React-specific
-      features here, so hydration errors should not be a problem. */}
-      <section suppressHydrationWarning className="breaches-table">
-        <header>
-          <span>{l10n.getString("column-company")}</span>
-          <span>{l10n.getString("column-breached-data")}</span>
-          {/* The active/resolved badge does not have a column header, but by
-          including an empty <span>, we can re-use the `nth-child`-based
-          selectors for the content columns. */}
-          <span></span>
-          <span>{l10n.getString("column-detected")}</span>
-        </header>
-        <div>{createBreachRows(userBreaches)}</div>
-        <template
-          className="no-breaches"
-          dangerouslySetInnerHTML={{
-            __html: `
-              <div class="zero-state no-breaches-message">
-                <img src="${
-                  ImageBreachesNone.src as string
-                }" alt="" width="136" height="102" />
-                <h2>${l10n.getString("breaches-none-headline")}</h2>
-                <p>
-                  ${l10n.getString("breaches-none-copy", {
-                    email: '<b class="current-email"></b>',
-                  })}
-                </p>
-                <p class="add-email-cta">
-                  <span>${l10n.getString("breaches-none-cta-blurb")}</span>
-                  <button
-                    class="primary"
-                    data-cta-id="breaches-none"
-                    data-dialog="addEmail"
-                  >
-                    ${l10n.getString("breaches-none-cta-button")}
-                  </button>
-                </p>
-              </div>
-            `,
-          }}
-        />
-        <template
-          // The DOM for this element is modified by regular JavaScript
-          // files that predate our migration to Next.js. We don’t use any
-          // React-specific features here, so hydration errors should
-          // not be a problem.
-          suppressHydrationWarning
-          className="all-breaches-resolved"
-          dangerouslySetInnerHTML={{
-            __html: `
-              <div class="zero-state all-breaches-resolved-message">
-                <img
-                  src="${ImageBreachesAllResolved.src as string}"
-                  alt=""
-                  width="136"
-                  height="102"
-                />
-                <h2>${l10n.getString("breaches-all-resolved-headline")}</h2>
-                <p>
-                  ${l10n.getString("breaches-all-resolved-copy", {
-                    email: '<b class="current-email"></b>',
-                  })}
-                </p>
-                <p class="add-email-cta">
-                  <span>${l10n.getString(
-                    "breaches-all-resolved-cta-blurb",
-                  )}</span>
-                  <button
-                    class="primary"
-                    data-cta-id="breaches-all-resolved"
-                    data-dialog="addEmail"
-                  >
-                    ${l10n.getString("breaches-all-resolved-cta-button")}
-                  </button>
-                </p>
-              </div>
-            `,
-          }}
-        />
-      </section>
-    </>
-  );
-};
diff --git a/src/app/deprecated/functions/server/getComponentAsString.ts b/src/app/deprecated/functions/server/getComponentAsString.ts
deleted file mode 100644
index 39f25b7f4..000000000
--- a/src/app/deprecated/functions/server/getComponentAsString.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { ReactElement } from "react";
-
-export type Props = {
-  component: ReactElement;
-};
-
-// If a component imports `react-dom/server` directly Next.js throws a
-// compilation error `ReactServerComponentsError` for perf and security reasons.
-export const getComponentAsString = async ({ component }: Props) => {
-  const ReactDOMServer = (await import("react-dom/server")).default;
-  return ReactDOMServer.renderToString(component);
-};
diff --git a/src/app/deprecated/functions/server/getNonce.ts b/src/app/deprecated/functions/server/getNonce.ts
deleted file mode 100644
index 96ffb0898..000000000
--- a/src/app/deprecated/functions/server/getNonce.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { headers } from "next/headers";
-
-export function getNonce() {
-  // This header gets set in /src/middleware.ts:
-  const nonce = headers().get("x-nonce") ?? undefined;
-  return nonce;
-}
diff --git a/src/app/deprecated/layout.tsx b/src/app/deprecated/layout.tsx
deleted file mode 100644
index ed6cf19f2..000000000
--- a/src/app/deprecated/layout.tsx
+++ /dev/null
@@ -1,61 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-import { ReactNode } from "react";
-import Script from "next/script";
-import { L10nProvider } from "../../contextProviders/localization";
-import { getL10nBundles } from "../functions/server/l10n";
-import { HandleFalseDoorTest } from "./components/client/FalseDoorBanner";
-import { getCountryCode } from "../functions/server/getCountryCode";
-import { headers } from "next/headers";
-import AppConstants from "../../appConstants";
-import { getNonce } from "./functions/server/getNonce";
-import { getEnabledFeatureFlags } from "../../db/tables/featureFlags";
-
-export default async function MigrationLayout({
-  children,
-}: {
-  children: ReactNode;
-}) {
-  const headersList = headers();
-  const l10nBundles = getL10nBundles();
-  const countryCode = getCountryCode(headersList);
-  const enabledFlags = await getEnabledFeatureFlags({ ignoreAllowlist: true });
-  const waitlistLink = AppConstants.FALSE_DOOR_TEST_LINK_PHASE_ONE;
-  const acceptLanguage = headersList.get("Accept-Language");
-
-  let locale = "";
-  if (acceptLanguage) {
-    const acceptedLocales = acceptLanguage.split(",");
-    const primaryLocale = acceptedLocales[0];
-    locale = primaryLocale.split(";")[0];
-  }
-
-  return (
-    <L10nProvider bundleSources={l10nBundles}>
-      {/* This script predates the use of React and thus shouldn’t wait for
-      hydration to adjust the layout. */}
-      {/* eslint-disable-next-line @next/next/no-sync-scripts */}
-      <script
-        type="module"
-        src="/nextjs_migration/client/js/resizeObserver.js"
-        rel="preload"
-        crossOrigin="anonymous"
-        nonce={getNonce()}
-      />
-      <Script
-        type="module"
-        src="/nextjs_migration/client/js/analytics.js"
-        nonce={getNonce()}
-      />
-      {children}
-      {enabledFlags.includes("FalseDoorTest") &&
-        waitlistLink &&
-        countryCode.toLowerCase() === "us" &&
-        ["en", "en-GB", "en-US", "en-CA"].includes(locale) && (
-          <HandleFalseDoorTest link={waitlistLink} />
-        )}
-    </L10nProvider>
-  );
-}
diff --git a/src/app/functions/server/getBreaches.ts b/src/app/functions/server/getBreaches.ts
index f53536535..9a91eb7c0 100644
--- a/src/app/functions/server/getBreaches.ts
+++ b/src/app/functions/server/getBreaches.ts
@@ -10,7 +10,7 @@ import {
   req,
 } from "../../../utils/hibp.js";
 import { upsertBreaches } from "../../../db/tables/breaches.js";
-import { Breach } from "../../deprecated/(authenticated)/user/breaches/breaches.js";
+import { Breach } from "../universal/breach.js";
 
 let breaches: Array<Breach | HibpLikeDbBreach>;
 
diff --git a/src/app/functions/universal/breach.ts b/src/app/functions/universal/breach.ts
index 05546bac8..46c32daf6 100644
--- a/src/app/functions/universal/breach.ts
+++ b/src/app/functions/universal/breach.ts
@@ -3,10 +3,32 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 import { DataClassEffected } from "../../../utils/subscriberBreaches";
-import { HibpBreachDataTypes } from "../../deprecated/(authenticated)/user/breaches/breaches";
 
 // TODO: Move pure functions that operate on breaches to this file
 
+export interface Breach {
+  AddedDate: string;
+  BreachDate: string;
+  DataClasses: Array<string>;
+  Description: string;
+  Domain: string;
+  Id: number;
+  IsFabricated: boolean;
+  IsMalware: boolean;
+  IsResolved?: boolean;
+  IsRetired: boolean;
+  IsSensitive: boolean;
+  IsSpamList: boolean;
+  IsVerified: boolean;
+  LogoPath: string;
+  ModifiedDate: string;
+  Name: string;
+  PwnCount: number;
+  recencyIndex: number;
+  ResolutionsChecked: Array<string>;
+  Title: string;
+}
+
 export const BreachDataTypes = {
   Passwords: "passwords",
   Email: "email-addresses",
@@ -53,6 +75,18 @@ export const SecurityRecommendationDataTypes = {
   IP: BreachDataTypes.IP,
 } as const;
 
+export type HibpBreachDataTypes = typeof BreachDataTypes;
+
+export interface BreachBulkResolutionRequest {
+  dataType: HibpBreachDataTypes;
+}
+
+export interface BreachResolutionRequest {
+  affectedEmail: string;
+  breachId: number;
+  resolutionsChecked: Array<HibpBreachDataTypes[keyof HibpBreachDataTypes]>;
+}
+
 export function isBreachResolved(
   dataClassesAffected: DataClassEffected[],
   resolvedDataClasses: Array<HibpBreachDataTypes[keyof HibpBreachDataTypes]>,
diff --git a/src/app/layout.tsx b/src/app/layout.tsx
index 5a66cb319..057db7060 100644
--- a/src/app/layout.tsx
+++ b/src/app/layout.tsx
@@ -15,7 +15,6 @@ import { metropolis } from "./fonts/Metropolis/metropolis";
 import { CONST_GA4_MEASUREMENT_ID } from "../constants";
 import { headers } from "next/headers";
 import { GoogleAnalyticsWorkaround } from "./components/client/GoogleAnalyticsWorkaround";
-import { getNonce } from "./deprecated/functions/server/getNonce";
 import StripeScript from "./components/client/StripeScript";
 
 // DO NOT ADD SECRETS: Env variables added here become public.
@@ -56,6 +55,7 @@ export default async function RootLayout({
 }: {
   children: ReactNode;
 }) {
+  const nonce = headers().get("x-nonce") ?? "";
   const currentLocale = getLocale(getL10nBundles());
   const session = await getServerSession();
 
@@ -76,7 +76,7 @@ export default async function RootLayout({
       {headers().get("DNT") !== "1" && (
         <GoogleAnalyticsWorkaround
           gaId={CONST_GA4_MEASUREMENT_ID}
-          nonce={getNonce()}
+          nonce={nonce}
           debugMode={
             process.env.NEXT_PUBLIC_GA4_DEBUG_MODE === "true" &&
             process.env.NODE_ENV !== "test"