diff --git a/browser/base/content/browser-contentblocking.js b/browser/base/content/browser-contentblocking.js
index 91d50e4035d4..b0b54b778015 100644
--- a/browser/base/content/browser-contentblocking.js
+++ b/browser/base/content/browser-contentblocking.js
@@ -8,6 +8,8 @@ var TrackingProtection = {
   PREF_ENABLED_GLOBALLY: "privacy.trackingprotection.enabled",
   PREF_ENABLED_IN_PRIVATE_WINDOWS: "privacy.trackingprotection.pbmode.enabled",
   PREF_UI_ENABLED: "browser.contentblocking.trackingprotection.control-center.ui.enabled",
+  PREF_TRACKING_TABLE: "urlclassifier.trackingTable",
+  PREF_TRACKING_ANNOTATION_TABLE: "urlclassifier.trackingAnnotationTable",
   enabledGlobally: false,
   enabledInPrivateWindows: false,
 
@@ -17,6 +19,16 @@ var TrackingProtection = {
       document.getElementById("identity-popup-content-blocking-category-tracking-protection");
   },
 
+  get subViewList() {
+    delete this.subViewList;
+    return this.subViewList = document.getElementById("identity-popup-trackersView-list");
+  },
+
+  get strictInfo() {
+    delete this.strictInfo;
+    return this.strictInfo = document.getElementById("identity-popup-trackersView-strict-info");
+  },
+
   init() {
     this.updateEnabled();
 
@@ -24,6 +36,8 @@ var TrackingProtection = {
     Services.prefs.addObserver(this.PREF_ENABLED_IN_PRIVATE_WINDOWS, this);
 
     XPCOMUtils.defineLazyPreferenceGetter(this, "visible", this.PREF_UI_ENABLED, false);
+    XPCOMUtils.defineLazyPreferenceGetter(this, "trackingTable", this.PREF_TRACKING_TABLE, false);
+    XPCOMUtils.defineLazyPreferenceGetter(this, "trackingAnnotationTable", this.PREF_TRACKING_ANNOTATION_TABLE, false);
   },
 
   uninit() {
@@ -51,6 +65,86 @@ var TrackingProtection = {
   isBlockerActivated(state) {
     return state & Ci.nsIWebProgressListener.STATE_BLOCKED_TRACKING_CONTENT;
   },
+
+  isAllowing(state) {
+    return state & Ci.nsIWebProgressListener.STATE_LOADED_TRACKING_CONTENT;
+  },
+
+  async updateSubView() {
+    let previousURI = gBrowser.currentURI.spec;
+    let previousWindow = gBrowser.selectedBrowser.innerWindowID;
+
+    let contentBlockingLogJSON = await gBrowser.selectedBrowser.getContentBlockingLog();
+    let contentBlockingLog = JSON.parse(contentBlockingLogJSON);
+
+    // Don't tell the user to turn on TP if they are already blocking trackers.
+    this.strictInfo.hidden = this.enabled;
+
+    let fragment = document.createDocumentFragment();
+    for (let [origin, actions] of Object.entries(contentBlockingLog)) {
+      let listItem = await this._createListItem(origin, actions);
+      if (listItem) {
+        fragment.appendChild(listItem);
+      }
+    }
+
+    // This might have taken a while. Only update the list if we're still on the same page.
+    if (previousURI == gBrowser.currentURI.spec &&
+        previousWindow == gBrowser.selectedBrowser.innerWindowID) {
+      this.subViewList.textContent = "";
+      this.subViewList.append(fragment);
+    }
+  },
+
+  // Given a URI from a source that was tracking-annotated, figure out
+  // if it's really on the tracking table or just on the annotation table.
+  _isOnTrackingTable(uri) {
+    if (this.trackingTable == this.trackingAnnotationTable) {
+      return true;
+    }
+    return new Promise(resolve => {
+      classifierService.asyncClassifyLocalWithTables(uri, this.trackingTable, [], [],
+        (code, list) => resolve(!!list));
+    });
+  },
+
+  async _createListItem(origin, actions) {
+    // Figure out if this list entry was actually detected by TP or something else.
+    let isDetected = false;
+    let isAllowed = false;
+    for (let [state] of actions) {
+      isAllowed = isAllowed || this.isAllowing(state);
+      isDetected = isDetected || isAllowed || this.isBlockerActivated(state);
+    }
+
+    if (!isDetected) {
+      return null;
+    }
+
+    let uri = Services.io.newURI(origin);
+
+    // Because we might use different lists for annotation vs. blocking, we
+    // need to make sure that this is a tracker that we would actually have blocked
+    // before showing it to the user.
+    let isTracker = await this._isOnTrackingTable(uri);
+    if (!isTracker) {
+      return null;
+    }
+
+    let listItem = document.createXULElement("hbox");
+    listItem.className = "identity-popup-trackersView-list-item";
+    listItem.classList.toggle("allowed", isAllowed);
+
+    let image = document.createXULElement("image");
+    listItem.append(image);
+
+    let label = document.createXULElement("label");
+    label.value = uri.host;
+    label.setAttribute("crop", "end");
+    listItem.append(label);
+
+    return listItem;
+  },
 };
 
 var ThirdPartyCookies = {
@@ -147,6 +241,11 @@ var ContentBlocking = {
     return this.appMenuLabel = document.getElementById("appMenu-tp-label");
   },
 
+  get identityPopup() {
+    delete this.identityPopup;
+    return this.identityPopup = document.getElementById("identity-popup");
+  },
+
   strings: {
     get appMenuTitle() {
       delete this.appMenuTitle;
@@ -238,7 +337,7 @@ var ContentBlocking = {
   },
 
   hideIdentityPopupAndReload() {
-    document.getElementById("identity-popup").hidePopup();
+    this.identityPopup.hidePopup();
     BrowserReload();
   },
 
@@ -251,7 +350,7 @@ var ContentBlocking = {
   },
 
   submitBreakageReport() {
-    document.getElementById("identity-popup").hidePopup();
+    this.identityPopup.hidePopup();
 
     let reportEndpoint = Services.prefs.getStringPref(this.PREF_REPORT_BREAKAGE_URL);
     if (!reportEndpoint) {
@@ -314,6 +413,11 @@ var ContentBlocking = {
     this.identityPopupMultiView.showSubView("identity-popup-breakageReportView");
   },
 
+  async showTrackersSubview() {
+    await TrackingProtection.updateSubView();
+    this.identityPopupMultiView.showSubView("identity-popup-trackersView");
+  },
+
   shieldHistogramAdd(value) {
     if (PrivateBrowsingUtils.isWindowPrivate(window)) {
       return;
diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
index 02581a9214f8..1d48c4956667 100644
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -143,6 +143,7 @@ if (AppConstants.NIGHTLY_BUILD) {
 // lazy service getters
 
 XPCOMUtils.defineLazyServiceGetters(this, {
+  classifierService: ["@mozilla.org/url-classifier/dbservice;1", "nsIURIClassifier"],
   Favicons: ["@mozilla.org/browser/favicon-service;1", "nsIFaviconService"],
   gAboutNewTabService: ["@mozilla.org/browser/aboutnewtab-service;1", "nsIAboutNewTabService"],
   gDNSService: ["@mozilla.org/network/dns-service;1", "nsIDNSService"],
diff --git a/browser/base/content/test/trackingUI/browser.ini b/browser/base/content/test/trackingUI/browser.ini
index 8c58ff26f4f8..5076c96a3ea2 100644
--- a/browser/base/content/test/trackingUI/browser.ini
+++ b/browser/base/content/test/trackingUI/browser.ini
@@ -23,3 +23,4 @@ support-files =
 [browser_trackingUI_state.js]
 [browser_trackingUI_state_all_disabled.js]
 [browser_trackingUI_telemetry.js]
+[browser_trackingUI_trackers_subview.js]
diff --git a/browser/base/content/test/trackingUI/browser_trackingUI_pbmode_exceptions.js b/browser/base/content/test/trackingUI/browser_trackingUI_pbmode_exceptions.js
index c462c3ab9255..601eab311516 100644
--- a/browser/base/content/test/trackingUI/browser_trackingUI_pbmode_exceptions.js
+++ b/browser/base/content/test/trackingUI/browser_trackingUI_pbmode_exceptions.js
@@ -59,9 +59,9 @@ function testTrackingPage(window) {
   ok(!hidden("#identity-popup-content-blocking-detected"), "blocking detected label is visible");
 
   ok(!hidden("#identity-popup-content-blocking-category-list"), "category list is visible");
-  ok(hidden("#identity-popup-content-blocking-category-tracking-protection > .identity-popup-content-blocking-category-add-blocking"),
-    "TP category item is not showing add blocking");
-  ok(!hidden("#identity-popup-content-blocking-category-tracking-protection > .identity-popup-content-blocking-category-state-label"),
+  ok(hidden("#identity-popup-content-blocking-category-tracking-protection > #identity-popup-content-blocking-tracking-protection-label-allowed"),
+    "TP category item is not showing the allowed label");
+  ok(!hidden("#identity-popup-content-blocking-category-tracking-protection > #identity-popup-content-blocking-tracking-protection-label-blocked"),
     "TP category item is set to blocked");
 }
 
@@ -84,9 +84,9 @@ function testTrackingPageUnblocked() {
   ok(!hidden("#identity-popup-content-blocking-detected"), "blocking detected label is visible");
 
   ok(!hidden("#identity-popup-content-blocking-category-list"), "category list is visible");
-  ok(hidden("#identity-popup-content-blocking-category-tracking-protection > .identity-popup-content-blocking-category-add-blocking"),
-    "TP category item is not showing add blocking");
-  ok(hidden("#identity-popup-content-blocking-category-tracking-protection > .identity-popup-content-blocking-category-state-label"),
+  ok(!hidden("#identity-popup-content-blocking-category-tracking-protection > #identity-popup-content-blocking-tracking-protection-label-allowed"),
+    "TP category item is showing the allowed label");
+  ok(hidden("#identity-popup-content-blocking-category-tracking-protection > #identity-popup-content-blocking-tracking-protection-label-blocked"),
     "TP category item is not set to blocked");
 }
 
diff --git a/browser/base/content/test/trackingUI/browser_trackingUI_state.js b/browser/base/content/test/trackingUI/browser_trackingUI_state.js
index 9a00d88691ea..a9835053c61c 100644
--- a/browser/base/content/test/trackingUI/browser_trackingUI_state.js
+++ b/browser/base/content/test/trackingUI/browser_trackingUI_state.js
@@ -134,20 +134,26 @@ function testTrackingPage(window) {
   ok(!hidden("#identity-popup-content-blocking-detected"), "blocking detected label is visible");
 
   ok(!hidden("#identity-popup-content-blocking-category-list"), "category list is visible");
-  let category = Services.prefs.getIntPref(TPC_PREF) == Ci.nsICookieService.BEHAVIOR_REJECT_TRACKER ?
-               "#identity-popup-content-blocking-category-3rdpartycookies" :
-               "#identity-popup-content-blocking-category-tracking-protection";
-  is(hidden(category + " > .identity-popup-content-blocking-category-add-blocking"), blockedByTP,
-    "Category item is" + (blockedByTP ? " not" : "") + " showing add blocking");
-  is(hidden(category + " > .identity-popup-content-blocking-category-state-label"), !blockedByTP,
-    "Category item is" + (blockedByTP ? "" : " not") + " set to blocked");
 
-  if (Services.prefs.getIntPref(TPC_PREF) == Ci.nsICookieService.BEHAVIOR_REJECT_TRACKER) {
+  let cookiesBlocked = Services.prefs.getIntPref(TPC_PREF) == Ci.nsICookieService.BEHAVIOR_REJECT_TRACKER;
+  if (cookiesBlocked) {
+    let category = "#identity-popup-content-blocking-category-3rdpartycookies";
+    is(hidden(category + " > .identity-popup-content-blocking-category-add-blocking"), blockedByTP,
+      "Category item is" + (blockedByTP ? " not" : "") + " showing add blocking");
+    is(hidden(category + " > .identity-popup-content-blocking-category-state-label"), !blockedByTP,
+      "Category item is" + (blockedByTP ? "" : " not") + " set to blocked");
+
     ok(hidden("#identity-popup-content-blocking-category-label-default"),
       "Not showing default cookie restrictions label.");
     ok(!hidden("#identity-popup-content-blocking-category-label-trackers"),
       "Showing trackers cookie restrictions label.");
   } else {
+    let category = "#identity-popup-content-blocking-category-tracking-protection";
+    is(hidden(category + " > #identity-popup-content-blocking-tracking-protection-label-allowed"), blockedByTP,
+      "Category item is" + (blockedByTP ? " not" : "") + " showing the allowed label");
+    is(!hidden(category + " > #identity-popup-content-blocking-tracking-protection-label-blocked"), blockedByTP,
+      "Category item is" + (blockedByTP ? "" : " not") + " set to blocked");
+
     ok(hidden("#identity-popup-content-blocking-category-label-trackers"),
       "Not showing trackers cookie restrictions label.");
     ok(!hidden("#identity-popup-content-blocking-category-label-default"),
@@ -175,14 +181,22 @@ function testTrackingPageUnblocked(blockedByTP, window) {
   ok(!hidden("#identity-popup-content-blocking-detected"), "blocking detected label is visible");
 
   ok(!hidden("#identity-popup-content-blocking-category-list"), "category list is visible");
-  let category = Services.prefs.getIntPref(TPC_PREF) == Ci.nsICookieService.BEHAVIOR_REJECT_TRACKER ?
-               "#identity-popup-content-blocking-category-3rdpartycookies" :
-               "#identity-popup-content-blocking-category-tracking-protection";
-  is(hidden(category + " > .identity-popup-content-blocking-category-add-blocking"), blockedByTP,
-    "Category item is" + (blockedByTP ? " not" : "") + " showing add blocking");
-  // Always hidden no matter if blockedByTP or not, since we have an exception.
-  ok(hidden("#identity-popup-content-blocking-category-tracking-protection > .identity-popup-content-blocking-category-state-label"),
-    "TP category item is not set to blocked");
+
+  let cookiesBlocked = Services.prefs.getIntPref(TPC_PREF) == Ci.nsICookieService.BEHAVIOR_REJECT_TRACKER;
+  if (cookiesBlocked) {
+    let category = "#identity-popup-content-blocking-category-3rdpartycookies";
+    is(hidden(category + " > .identity-popup-content-blocking-category-add-blocking"), blockedByTP,
+      "Category item is" + (blockedByTP ? " not" : "") + " showing add blocking");
+    ok(!hidden("#identity-popup-content-blocking-category-tracking-protection > #identity-popup-content-blocking-tracking-protection-label-allowed"),
+      "TP category item is showing the allowed label");
+  } else {
+    let category = "#identity-popup-content-blocking-category-tracking-protection";
+    // If there's an exception we always show the "Allowed" label.
+    ok(!hidden(category + " > #identity-popup-content-blocking-tracking-protection-label-allowed"),
+      "Category item is showing the allowed label");
+    ok(hidden(category + " > #identity-popup-content-blocking-tracking-protection-label-blocked"),
+      "Category item is not set to blocked");
+  }
 }
 
 async function testContentBlocking(tab) {
diff --git a/browser/base/content/test/trackingUI/browser_trackingUI_trackers_subview.js b/browser/base/content/test/trackingUI/browser_trackingUI_trackers_subview.js
new file mode 100644
index 000000000000..45e6f19968c7
--- /dev/null
+++ b/browser/base/content/test/trackingUI/browser_trackingUI_trackers_subview.js
@@ -0,0 +1,118 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TRACKING_PAGE = "http://tracking.example.org/browser/browser/base/content/test/trackingUI/trackingPage.html";
+
+const TP_PREF = "privacy.trackingprotection.enabled";
+
+add_task(async function setup() {
+  await UrlClassifierTestUtils.addTestTrackers();
+});
+
+function openIdentityPopup() {
+  let mainView = document.getElementById("identity-popup-mainView");
+  let viewShown = BrowserTestUtils.waitForEvent(mainView, "ViewShown");
+  gIdentityHandler._identityBox.click();
+  return viewShown;
+}
+
+function waitForSecurityChange(blocked) {
+  return new Promise(resolve => {
+    let webProgressListener = {
+      onStateChange: () => {},
+      onStatusChange: () => {},
+      onLocationChange: () => {},
+      onSecurityChange: (webProgress, request, oldState, state) => {
+        if ((!blocked && state & Ci.nsIWebProgressListener.STATE_LOADED_TRACKING_CONTENT) ||
+            (blocked && state & Ci.nsIWebProgressListener.STATE_BLOCKED_TRACKING_CONTENT)) {
+          gBrowser.removeProgressListener(webProgressListener);
+          resolve();
+        }
+      },
+      onProgressChange: () => {},
+      QueryInterface: ChromeUtils.generateQI([Ci.nsIWebProgressListener]),
+    };
+
+    gBrowser.addProgressListener(webProgressListener);
+  });
+}
+
+async function assertSitesListed(blocked) {
+  await BrowserTestUtils.withNewTab(TRACKING_PAGE, async function(browser) {
+    await openIdentityPopup();
+
+    let categoryItem =
+      document.getElementById("identity-popup-content-blocking-category-tracking-protection");
+    ok(BrowserTestUtils.is_visible(categoryItem), "TP category item is visible");
+    let trackersView = document.getElementById("identity-popup-trackersView");
+    let viewShown = BrowserTestUtils.waitForEvent(trackersView, "ViewShown");
+    categoryItem.click();
+    await viewShown;
+
+    ok(true, "Trackers view was shown");
+
+    let listItems = document.querySelectorAll(".identity-popup-trackersView-list-item");
+    is(listItems.length, 1, "We have 1 tracker in the list");
+
+    let strictInfo = document.getElementById("identity-popup-trackersView-strict-info");
+    is(BrowserTestUtils.is_hidden(strictInfo), Services.prefs.getBoolPref(TP_PREF),
+      "Strict info is hidden if TP is enabled.");
+
+    let mainView = document.getElementById("identity-popup-mainView");
+    viewShown = BrowserTestUtils.waitForEvent(mainView, "ViewShown");
+    let backButton = trackersView.querySelector(".subviewbutton-back");
+    backButton.click();
+    await viewShown;
+
+    ok(true, "Main view was shown");
+
+    let change = waitForSecurityChange(blocked);
+
+    await ContentTask.spawn(browser, {}, function() {
+      content.postMessage("more-tracking", "*");
+    });
+
+    await change;
+
+    viewShown = BrowserTestUtils.waitForEvent(trackersView, "ViewShown");
+    categoryItem.click();
+    await viewShown;
+
+    ok(true, "Trackers view was shown");
+
+    listItems = Array.from(document.querySelectorAll(".identity-popup-trackersView-list-item"));
+    is(listItems.length, 2, "We have 2 trackers in the list");
+
+    let listItem = listItems.find(item => item.querySelector("label").value == "trackertest.org");
+    ok(listItem, "Has an item for trackertest.org");
+    ok(BrowserTestUtils.is_visible(listItem), "List item is visible");
+    is(listItem.classList.contains("allowed"), !blocked,
+      "Indicates whether the tracker was blocked or allowed");
+
+    listItem = listItems.find(item => item.querySelector("label").value == "itisatracker.org");
+    ok(listItem, "Has an item for itisatracker.org");
+    ok(BrowserTestUtils.is_visible(listItem), "List item is visible");
+    is(listItem.classList.contains("allowed"), !blocked,
+      "Indicates whether the tracker was blocked or allowed");
+  });
+}
+
+add_task(async function testTrackersSubView() {
+  Services.prefs.setBoolPref(TP_PREF, false);
+  await assertSitesListed(false);
+  Services.prefs.setBoolPref(TP_PREF, true);
+  await assertSitesListed(true);
+  let uri = Services.io.newURI("https://tracking.example.org");
+  Services.perms.add(uri, "trackingprotection", Services.perms.ALLOW_ACTION);
+  await assertSitesListed(false);
+  Services.perms.remove(uri, "trackingprotection");
+  await assertSitesListed(true);
+  Services.prefs.clearUserPref(TP_PREF);
+});
+
+add_task(function cleanup() {
+  Services.prefs.clearUserPref(TP_PREF);
+  UrlClassifierTestUtils.cleanupTestTrackers();
+});
diff --git a/browser/base/content/test/trackingUI/trackingAPI.js b/browser/base/content/test/trackingUI/trackingAPI.js
index 5e842e708922..ad95c1c71442 100644
--- a/browser/base/content/test/trackingUI/trackingAPI.js
+++ b/browser/base/content/test/trackingUI/trackingAPI.js
@@ -6,6 +6,12 @@ onmessage = event => {
       document.body.appendChild(ifr);
     }
     break;
+  case "more-tracking": {
+      let ifr = document.createElement("iframe");
+      ifr.src = "https://itisatracker.org/";
+      document.body.appendChild(ifr);
+    }
+    break;
   case "cookie": {
       let ifr = document.createElement("iframe");
       ifr.src = "https://trackertest.org/browser/browser/base/content/test/trackingUI/cookieServer.sjs";
diff --git a/browser/components/controlcenter/content/panel.inc.xul b/browser/components/controlcenter/content/panel.inc.xul
index 423d63a62865..9f3156d53f63 100644
--- a/browser/components/controlcenter/content/panel.inc.xul
+++ b/browser/components/controlcenter/content/panel.inc.xul
@@ -82,15 +82,16 @@
                        crop="end">&contentBlocking.notDetected;</description>
 
           <vbox id="identity-popup-content-blocking-category-list">
-            <hbox id="identity-popup-content-blocking-category-tracking-protection"
-                  class="identity-popup-content-blocking-category" align="center" role="group">
+            <toolbarbutton id="identity-popup-content-blocking-category-tracking-protection"
+                  onclick="ContentBlocking.showTrackersSubview()"
+                  class="identity-popup-content-blocking-category" align="center">
               <image class="identity-popup-content-blocking-category-icon tracking-protection-icon"/>
               <label flex="1" class="identity-popup-content-blocking-category-label">&contentBlocking.trackingProtection3.label;</label>
-              <label flex="1" class="identity-popup-content-blocking-category-state-label">&contentBlocking.trackingProtection.blocking.label;</label>
-              <label flex="1" class="identity-popup-content-blocking-category-add-blocking text-link"
-                     id="identity-popup-tracking-protection-add-blocking"
-                     onclick="ContentBlocking.openPreferences('identityPopup-CB-tracking-protection'); gIdentityHandler.recordClick('tp_add_blocking');">&contentBlocking.trackingProtection.add.label;</label>
-            </hbox>
+              <label flex="1" id="identity-popup-content-blocking-tracking-protection-label-allowed"
+                     class="identity-popup-content-blocking-category-state-label">&contentBlocking.trackingProtection.allowed.label;</label>
+              <label flex="1" id="identity-popup-content-blocking-tracking-protection-label-blocked"
+                     class="identity-popup-content-blocking-category-state-label">&contentBlocking.trackingProtection.blocked.label;</label>
+            </toolbarbutton>
             <hbox id="identity-popup-content-blocking-category-3rdpartycookies"
                   class="identity-popup-content-blocking-category" align="center" role="group">
               <image class="identity-popup-content-blocking-category-icon thirdpartycookies-icon"/>
@@ -249,6 +250,25 @@
 
     </panelview>
 
+    <!-- Trackers SubView -->
+    <panelview id="identity-popup-trackersView"
+               role="document"
+               title="&contentBlocking.trackersView.label;"
+               descriptionheightworkaround="true">
+        <vbox id="identity-popup-trackersView-list">
+        </vbox>
+        <hbox id="identity-popup-trackersView-strict-info">
+          <image/>
+          <label>&contentBlocking.trackersView.strictInfo.label;</label>
+        </hbox>
+        <vbox class="identity-popup-footer">
+          <button id="identity-popup-trackersView-settings-button"
+                  label="&contentBlocking.manageSettings.label;"
+                  accesskey="&contentBlocking.manageSettings.accesskey;"
+                  oncommand="ContentBlocking.openPreferences();"/>
+        </vbox>
+    </panelview>
+
     <!-- Report Breakage SubView -->
     <panelview id="identity-popup-breakageReportView"
                title="&contentBlocking.breakageReportView.label;"
diff --git a/browser/locales/en-US/chrome/browser/browser.dtd b/browser/locales/en-US/chrome/browser/browser.dtd
index b0b1723e8f9f..a93722c3e808 100644
--- a/browser/locales/en-US/chrome/browser/browser.dtd
+++ b/browser/locales/en-US/chrome/browser/browser.dtd
@@ -970,24 +970,19 @@ you can use these alternative items. Otherwise, their values should be empty.  -
 <!ENTITY contentBlocking.disabled.tooltip "You have disabled Content Blocking.">
 <!ENTITY contentBlocking.exception.tooltip "You have disabled Content Blocking for this site.">
 
-<!ENTITY contentBlocking.trackingProtection2.label "All Detected Trackers">
 <!ENTITY contentBlocking.trackingProtection3.label "Trackers">
+<!-- LOCALIZATION NOTE (contentBlocking.trackingProtection.allowed.label):
+     This label signals that this type of content blocking is turned
+     OFF and is not blocking tracker content, so this is not
+     a positive thing. It forms the end of the (imaginary) sentence
+     "Trackers [are] Allowed"-->
+<!ENTITY contentBlocking.trackingProtection.allowed.label "Allowed">
 <!-- LOCALIZATION NOTE (contentBlocking.trackingProtection.blocked.label):
      This label signals that this type of content blocking is turned
      ON and is successfully blocking tracker content, so this is
      a positive thing. It forms the end of the (imaginary) sentence
      "Trackers [are] Blocked"-->
 <!ENTITY contentBlocking.trackingProtection.blocked.label "Blocked">
-<!-- LOCALIZATION NOTE (contentBlocking.tranckingProtection.blocking.label):
-     This label signals that this type of content blocking is turned
-     ON, so this is a positive thing. It forms the verb in the (imaginary) sentence
-     "Firefox is blocking Trackers"-->
-<!ENTITY contentBlocking.trackingProtection.blocking.label "Blocking">
-<!-- LOCALIZATION NOTE (contentBlocking.trackingProtection.add.label):
-     This is displayed as a link to preferences, where the user can add
-     this specific type of content blocking. When this text is shown
-     the type of content blocking is currently not enabled. -->
-<!ENTITY contentBlocking.trackingProtection.add.label "Add Blocking…">
 
 <!ENTITY contentBlocking.3rdPartyCookies.label "Third-Party Cookies">
 <!ENTITY contentBlocking.3rdPartyCookies.trackers.label "Tracking Cookies">
@@ -1008,6 +1003,12 @@ you can use these alternative items. Otherwise, their values should be empty.  -
      the type of content blocking is currently not enabled. -->
 <!ENTITY contentBlocking.3rdPartyCookies.add.label "Add Blocking…">
 
+<!ENTITY contentBlocking.manageSettings.label "Manage Content Blocking">
+<!ENTITY contentBlocking.manageSettings.accesskey "M">
+
+<!ENTITY contentBlocking.trackersView.label "Trackers">
+<!ENTITY contentBlocking.trackersView.strictInfo.label "To block all trackers, set content blocking to “Strict”.">
+
 <!ENTITY contentBlocking.openBreakageReportView2.label "Report a problem">
 <!ENTITY contentBlocking.breakageReportView.label "Report Problems">
 <!ENTITY contentBlocking.breakageReportView2.description "Content blocking can cause problems with some websites. When you report problems, you’ll help make &brandShortName; better for everyone. (This will send a URL as well as information about your browser settings to Mozilla.)">
diff --git a/browser/themes/shared/controlcenter/info.svg b/browser/themes/shared/controlcenter/info.svg
new file mode 100644
index 000000000000..151919754030
--- /dev/null
+++ b/browser/themes/shared/controlcenter/info.svg
@@ -0,0 +1,4 @@
+<!-- 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/. -->
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16"><path fill="context-fill" fill-rule="evenodd" d="M8 1a7 7 0 1 1-7 7 7 7 0 0 1 7-7zm0 3a1 1 0 1 1-1 1 1 1 0 0 1 1-1zm0 3a1 1 0 0 1 1 1v3a1 1 0 0 1-2 0V8a1 1 0 0 1 1-1z"></path></svg>
diff --git a/browser/themes/shared/controlcenter/panel.inc.css b/browser/themes/shared/controlcenter/panel.inc.css
index 57ae998d2b12..51e87ba7ee46 100644
--- a/browser/themes/shared/controlcenter/panel.inc.css
+++ b/browser/themes/shared/controlcenter/panel.inc.css
@@ -9,6 +9,10 @@
   display: none;
 }
 
+#identity-popup {
+  --identity-popup-width: 33rem;
+}
+
 /* This is used by screenshots tests to hide intermittently different
  * identity popup shadows (see bug 1425253). */
 #identity-popup.no-shadow {
@@ -68,8 +72,8 @@
 }
 
 #identity-popup-mainView {
-  min-width: 33em;
-  max-width: 33em;
+  min-width: var(--identity-popup-width);
+  max-width: var(--identity-popup-width);
 }
 
 .identity-popup-section {
@@ -145,7 +149,12 @@
 
 /* CONTENT */
 
+.identity-popup-footer,
+.tracking-protection-button,
+#identity-popup-trackersView-strict-info > label,
+.identity-popup-trackersView-list-item > label,
 #identity-popup-mainView-panel-header > label,
+#identity-popup-trackersView > .panel-header,
 #identity-popup-securityView > .panel-header,
 #identity-popup-breakageReportView > .panel-header,
 #identity-popup-content-blocking-report-breakage,
@@ -178,7 +187,7 @@
   overflow-wrap: break-word;
   /* This is needed for the overflow-wrap to work correctly.
    * 33em is the panel width, panel-header has 1em padding on each side. */
-  max-width: calc(33rem - 2em);
+  max-width: calc(var(--identity-popup-width) - 2em);
 }
 
 #identity-popup-permissions-content > description,
@@ -201,7 +210,7 @@
   /* This is needed for the overflow-wrap to work correctly.
    * 1em + 2em + 24px is .identity-popup-security-content padding
    * 33em is the panel width */
-  max-width: calc(33rem - 3rem - 24px);
+  max-width: calc(var(--identity-popup-width) - 3rem - 24px);
 }
 
 .identity-popup-warning-gray {
@@ -382,6 +391,93 @@ description#identity-popup-content-verifier,
   background-image: url("chrome://browser/skin/controlcenter/tracking-protection.svg");
 }
 
+#identity-popup-content-blocking-category-tracking-protection {
+  /* Overwrite toolbarbutton styles */
+  margin: 0;
+  padding-inline-start: 0;
+}
+
+#identity-popup-content-blocking-category-tracking-protection:-moz-focusring,
+#identity-popup-content-blocking-category-tracking-protection:hover {
+  border-radius: 2px;
+  background-color: var(--arrowpanel-dimmed-further);
+}
+
+#identity-popup-content-blocking-category-tracking-protection:hover:active {
+  background-color: var(--arrowpanel-dimmed-even-further);
+}
+
+#identity-popup-content-blocking-category-tracking-protection::after {
+  content: url(chrome://browser/skin/back-12.svg);
+  -moz-context-properties: fill, fill-opacity;
+  transform: scaleX(-1) translateY(1px);
+  float: right;
+}
+
+#identity-popup-content-blocking-category-tracking-protection:-moz-locale-dir(rtl)::after {
+  transform: scaleX(1) translateY(1px);
+}
+
+/* This subview could get filled with a lot of trackers, set a maximum size
+ * and allow it to scroll vertically.*/
+#identity-popup-trackersView {
+  max-height: 600px;
+}
+
+#identity-popup-trackersView-list {
+  padding: 5px 20px;
+  -moz-box-flex: 1;
+  overflow: scroll;
+}
+
+.identity-popup-trackersView-list-item {
+  margin: 5px 0;
+  overflow: hidden;
+}
+
+.identity-popup-trackersView-list-item > label {
+  /* Limit to full width - container padding - icon width - icon margin */
+  max-width: calc(var(--identity-popup-width) - 40px - 16px - 10px);
+}
+
+.identity-popup-trackersView-list-item > image {
+  list-style-image: url(chrome://browser/skin/controlcenter/trackers-disabled.svg);
+  margin-inline-end: 10px;
+  -moz-context-properties: fill, fill-opacity;
+}
+
+.identity-popup-trackersView-list-item.allowed > image {
+  list-style-image: url(chrome://browser/skin/controlcenter/trackers.svg);
+}
+
+#identity-popup-trackersView-strict-info {
+  min-height: 40px;
+  /* Limit to full width - margin */
+  max-width: calc(var(--identity-popup-width) - 12px);
+  min-width: calc(var(--identity-popup-width) - 12px);
+  background-color: #45a1ff80;
+  margin: 6px;
+  text-align: center;
+  -moz-box-align: center;
+  -moz-box-pack: center;
+  padding: 5px 15px;
+  border-radius: 3px;
+  color: #002275;
+}
+
+#identity-popup-trackersView-strict-info > image {
+  list-style-image: url(chrome://browser/skin/controlcenter/info.svg);
+  -moz-context-properties: fill;
+  fill: currentColor;
+  margin-inline-end: 10px;
+}
+
+#identity-popup-trackersView-strict-info > label {
+  overflow-wrap: break-word;
+  /* Limit to full width - container margin - container padding - icon width - icon margin */
+  max-width: calc(var(--identity-popup-width) - 12px - 20px - 16px - 10px);
+}
+
 /* Disabled label */
 
 #identity-popup-content-blocking-disabled-label {
@@ -433,11 +529,20 @@ description#identity-popup-content-verifier,
   display: none;
 }
 
-#identity-popup-content-blocking-content[hasException] .identity-popup-content-blocking-category-state-label,
-.identity-popup-content-blocking-category:not(.blocked) .identity-popup-content-blocking-category-state-label {
+.identity-popup-content-blocking-category-state-label {
   display: none;
 }
 
+/* TODO: This will be cleaned up by bug 1501992 */
+/* Hide the state label unless we blocked something only for third party cookies */
+#identity-popup-content-blocking-content:not([hasException]) #identity-popup-content-blocking-category-3rdpartycookies.blocked .identity-popup-content-blocking-category-state-label,
+/* For trackers, either show a "blocked" or "allowed" label depending on the state. */
+#identity-popup-content-blocking-content:not([hasException]) #identity-popup-content-blocking-category-tracking-protection.blocked > #identity-popup-content-blocking-tracking-protection-label-blocked,
+#identity-popup-content-blocking-category-tracking-protection:not(.blocked) > #identity-popup-content-blocking-tracking-protection-label-allowed,
+#identity-popup-content-blocking-content[hasException] #identity-popup-content-blocking-tracking-protection-label-allowed {
+  display: -moz-box;
+}
+
 .identity-popup-content-blocking-category.blocked .identity-popup-content-blocking-category-add-blocking {
   display: none;
 }
@@ -468,6 +573,7 @@ description#identity-popup-content-verifier,
   height: 32px;
   background-color: var(--arrowpanel-dimmed);
   color: inherit;
+  margin-inline-end: 8px;
 }
 
 .tracking-protection-button:hover {
@@ -551,7 +657,7 @@ description#identity-popup-content-verifier,
   /* Offset the padding set on #identity-popup-permissions-content so that it
      shows up just below the section. The permission icons are 16px wide and
      should be right aligned with the section icon. */
-  margin-inline-start: calc(-1em - 16px);
+  margin-inline-start: calc(-1em - 24px);
 }
 
 .identity-popup-content-blocking-category,
@@ -559,6 +665,14 @@ description#identity-popup-content-verifier,
   min-height: 24px;
 }
 
+.identity-popup-content-blocking-category {
+  padding-inline-end: 12px;
+}
+
+.identity-popup-permission-item {
+  padding-inline-end: 8px;
+}
+
 #identity-popup-permission-list:not(:empty) {
   margin-top: 5px;
 }
@@ -567,6 +681,7 @@ description#identity-popup-content-verifier,
 .identity-popup-permission-icon {
   width: 16px;
   height: 16px;
+  margin-inline-start: 12px;
 }
 
 .identity-popup-permission-icon.in-use {
diff --git a/browser/themes/shared/jar.inc.mn b/browser/themes/shared/jar.inc.mn
index f9878e1b38c9..b3318673caf9 100644
--- a/browser/themes/shared/jar.inc.mn
+++ b/browser/themes/shared/jar.inc.mn
@@ -28,6 +28,7 @@
   skin/classic/browser/controlcenter/connection.svg            (../shared/controlcenter/connection.svg)
   skin/classic/browser/controlcenter/mcb-disabled.svg          (../shared/controlcenter/mcb-disabled.svg)
   skin/classic/browser/controlcenter/extension.svg             (../shared/controlcenter/extension.svg)
+  skin/classic/browser/controlcenter/info.svg                  (../shared/controlcenter/info.svg)
   skin/classic/browser/controlcenter/permissions.svg           (../shared/controlcenter/permissions.svg)
   skin/classic/browser/controlcenter/trackers.svg              (../shared/controlcenter/trackers.svg)
   skin/classic/browser/controlcenter/trackers-disabled.svg     (../shared/controlcenter/trackers-disabled.svg)
diff --git a/build/pgo/certs/cert9.db b/build/pgo/certs/cert9.db
index 4c453a7a9c92..e69de29bb2d1 100644
Binary files a/build/pgo/certs/cert9.db and b/build/pgo/certs/cert9.db differ
diff --git a/build/pgo/certs/key4.db b/build/pgo/certs/key4.db
index 06c967ea7e9f..e69de29bb2d1 100644
Binary files a/build/pgo/certs/key4.db and b/build/pgo/certs/key4.db differ
diff --git a/build/pgo/certs/mochitest.client b/build/pgo/certs/mochitest.client
index b79fb90c8518..e69de29bb2d1 100644
Binary files a/build/pgo/certs/mochitest.client and b/build/pgo/certs/mochitest.client differ
diff --git a/build/pgo/server-locations.txt b/build/pgo/server-locations.txt
index 8748f618926c..e790b68f567e 100644
--- a/build/pgo/server-locations.txt
+++ b/build/pgo/server-locations.txt
@@ -175,6 +175,7 @@ http://not-tracking.example.com:80
 http://tracking.example.org:80
 http://another-tracking.example.net:80
 http://itisatracker.org:80
+https://itisatracker.org:443
 http://trackertest.org:80
 
 https://malware.example.com:443