diff --git a/testing/talos/talos/tests/devtools/addon/content/pages/custom/console/index.html b/testing/talos/talos/tests/devtools/addon/content/pages/custom/console/index.html
index 43ecee76b3fe..8de2b7fbb101 100644
--- a/testing/talos/talos/tests/devtools/addon/content/pages/custom/console/index.html
+++ b/testing/talos/talos/tests/devtools/addon/content/pages/custom/console/index.html
@@ -22,19 +22,10 @@
   // Create the iframe URL from the current URL to preserve the parameters.
   const searchParamsEncoded = document.location.search;
   const searchParams = new URLSearchParams(searchParamsEncoded);
-  const domains = searchParams.get("domains");
-
-  // We append a number of iframes equal to the number of domains.
-  // The first iframe has a domain with the same site as the damp top frame (http://damp.top.com).
-  // Second and subsequent iframes switch to a different-site URL (eg http://damp.iframeN.com).
-  for (let d = 0; d < domains; d++) {
-    const domain = d ? `damp.iframe${d}.com` : `damp.top.com`;
-    const iframeSrc = `http://${domain}/tests/devtools/addon/content/pages/custom/console/iframe.html${searchParamsEncoded}`;
-
-    const iframe = document.createElement("iframe");
-    iframe.setAttribute("src", iframeSrc);
-    document.body.appendChild(iframe);
-  }
+  const iframeSrc = `http://damp.iframe.com/tests/devtools/addon/content/pages/custom/console/iframe.html${searchParamsEncoded}`;
+  const iframe = document.createElement("iframe");
+  iframe.setAttribute("src", iframeSrc);
+  document.body.appendChild(iframe);
 </script>
 </body>
 </html>
diff --git a/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/bulklog.js b/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/bulklog.js
index 85593efeb1e2..66ecbb34140a 100644
--- a/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/bulklog.js
+++ b/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/bulklog.js
@@ -33,8 +33,8 @@ module.exports = async function() {
         `function () {
       const obj = {};
       for (let i = 0; i < 1000; i++) {
-        obj["item-" + i] = {index: i, ...obj}; 
-      } 
+        obj["item-" + i] = {index: i, ...obj};
+      }
       addMessageListener("do-logs", function () {
         const start = Cu.now();
         for (var i = 0; i < ${TOTAL_MESSAGES}; i++) {
@@ -52,9 +52,17 @@ module.exports = async function() {
 
   const allMessagesreceived = waitForConsoleOutputChildListChange(
     hud,
-    consoleOutput =>
-      consoleOutput.querySelectorAll(".message").length >= TOTAL_MESSAGES &&
-      consoleOutput.textContent.includes("damp " + TOTAL_MESSAGES)
+    consoleOutput => {
+      const messages = Array.from(
+        consoleOutput.querySelectorAll(".message-body")
+      );
+      return (
+        messages.find(message => message.textContent.includes("damp 1")) &&
+        messages.find(message =>
+          message.textContent.includes("damp " + TOTAL_MESSAGES)
+        )
+      );
+    }
   );
 
   // Kick off the logging
diff --git a/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/complicated.js b/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/complicated.js
index 822c3980e9b7..78d323e6b177 100644
--- a/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/complicated.js
+++ b/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/complicated.js
@@ -8,7 +8,6 @@ const Services = require("Services");
 const {
   openToolboxAndLog,
   closeToolboxAndLog,
-  isFissionEnabled,
   testSetup,
   testTeardown,
   COMPLICATED_URL,
@@ -16,56 +15,46 @@ const {
 const {
   reloadConsoleAndLog,
 } = require("damp-test/tests/webconsole/webconsole-helpers");
-const { AppConstants } = require("resource://gre/modules/AppConstants.jsm");
 
+// The virtualized list render all the messages that fit in the console output, and 20 more,
+// so all the expected messages here should be rendered.
 const EXPECTED_MESSAGES = [
-  {
-    text: `This page uses the non standard property “zoom”`,
-    count: isFissionEnabled() ? 1 : 2,
-    visibleWhenFissionEnabled: true,
-  },
-  {
-    text: `Layout was forced before the page was fully loaded.`,
-    visibleWhenFissionEnabled: true,
-  },
-  {
-    text: `Some cookies are misusing the “SameSite“ attribute, so it won’t work as expected`,
-    visibleWhenFissionEnabled: true,
-    nightlyOnly: true,
-  },
-  {
-    text: `Uncaught DOMException: XMLHttpRequest.send: XMLHttpRequest state must be OPENED.`,
-    visibleWhenFissionEnabled: true,
-  },
   {
     text: `Uncaught SyntaxError: missing ) after argument list`,
     count: 2,
-    visibleWhenFissionEnabled: false,
   },
   {
     text: `Uncaught ReferenceError: Bootloaddisableder is not defined`,
     count: 4,
-    visibleWhenFissionEnabled: false,
+    stacktrace: true,
   },
-].filter(
-  ({ visibleWhenFissionEnabled, nightlyOnly }) =>
-    (!isFissionEnabled() || visibleWhenFissionEnabled) &&
-    (!nightlyOnly || AppConstants.NIGHTLY_BUILD)
-);
+  {
+    text: `Uncaught DOMException: XMLHttpRequest.send: XMLHttpRequest state must be OPENED`,
+  },
+];
 
 module.exports = async function() {
-  // Disable overlay scrollbars to display the message "Layout was forced before the page was fully loaded"
-  // consistently. See Bug 1684963.
-  Services.prefs.setIntPref("ui.useOverlayScrollbars", 0);
-
   await testSetup(COMPLICATED_URL);
 
+  // Disabling all filters but Errors, as they are more likely to be stable (unlike
+  // warning messages which can be added more frequently as the platform evolves)
+  const filtersToDisable = [
+    "devtools.webconsole.filter.warn",
+    "devtools.webconsole.filter.info",
+    "devtools.webconsole.filter.log",
+    "devtools.webconsole.filter.debug",
+  ];
+  for (const filter of filtersToDisable) {
+    Services.prefs.setBoolPref(filter, false);
+  }
+
   let toolbox = await openToolboxAndLog("complicated.webconsole", "webconsole");
   await reloadConsoleAndLog("complicated", toolbox, EXPECTED_MESSAGES);
   await closeToolboxAndLog("complicated.webconsole", toolbox);
 
-  // Restore (most likely delete) the overlay scrollbars preference.
-  Services.prefs.clearUserPref("ui.useOverlayScrollbars");
+  for (const filter of filtersToDisable) {
+    Services.prefs.clearUserPref(filter);
+  }
 
   await testTeardown();
 };
diff --git a/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/custom.js b/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/custom.js
index 197d2ce7bb1e..b60b00ca2ef3 100644
--- a/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/custom.js
+++ b/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/custom.js
@@ -18,24 +18,24 @@ const {
 const TEST_URL = PAGES_BASE_URL + "custom/console/index.html";
 
 module.exports = async function() {
-  // This is the number of iframes created in the test. Each iframe will create
-  // a number of console messages equal to the sum of the numbers below. The
-  // first iframe will use the same domain as the parent document. The remaining
-  // iframes will use unique domains.
-  const domains = 2;
-
   // These numbers controls the number of console api calls we do in the test
-  const sync = 250,
+  const sync = 500,
     stream = 250,
-    batch = 250,
+    batch = 500,
     simple = 5000;
 
-  const params = `?domains=${domains}&sync=${sync}&stream=${stream}&batch=${batch}&simple=${simple}`;
+  const params = `?sync=${sync}&stream=${stream}&batch=${batch}&simple=${simple}`;
   const url = TEST_URL + params;
   await testSetup(url, { disableCache: true });
 
   const toolbox = await openToolboxAndLog("custom.webconsole", "webconsole");
-  await reloadConsoleAndLog("custom", toolbox, sync + stream + batch + simple);
+  // With virtualization, we won't have all the messages rendered in the DOM, so we only
+  // wait for the last message to be displayed ("simple log 4999").
+  await reloadConsoleAndLog("custom", toolbox, [
+    {
+      text: "simple log " + (simple - 1),
+    },
+  ]);
   await closeToolboxAndLog("custom.webconsole", toolbox);
 
   await testTeardown();
diff --git a/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/typing.js b/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/typing.js
index 628fb3be3968..a8fbd2a9f905 100644
--- a/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/typing.js
+++ b/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/typing.js
@@ -18,7 +18,7 @@ const LOGS_NUMBER = 500;
 
 module.exports = async function() {
   const input = "abcdefghijklmnopqrst";
-  await testSetup(`data:text/html,<meta charset=utf8><script>
+  await testSetup(`data:text/html,<!DOCTYPE html><meta charset=utf8><script>
     for (let i = 0; i < ${LOGS_NUMBER}; i++) {
       const key = "item" + i;
       console.log(i, key, [i], {key});
@@ -33,9 +33,17 @@ module.exports = async function() {
   const { jsterm } = hud;
 
   // Wait for all the logs to be displayed.
-  await waitFor(
-    () => hud.ui.outputNode.querySelectorAll(".message").length >= LOGS_NUMBER
-  );
+  await waitFor(() => {
+    const messages = Array.from(
+      hud.ui.outputNode.querySelectorAll(".message-body")
+    );
+    return (
+      messages.find(message => message.textContent.includes(`item0`)) &&
+      messages.find(message =>
+        message.textContent.includes(`item${LOGS_NUMBER - 1}`)
+      )
+    );
+  });
 
   jsterm.focus();
 
diff --git a/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/webconsole-helpers.js b/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/webconsole-helpers.js
index 5f608904cb88..d70dc92eedd5 100644
--- a/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/webconsole-helpers.js
+++ b/testing/talos/talos/tests/devtools/addon/content/tests/webconsole/webconsole-helpers.js
@@ -15,6 +15,7 @@ const { reloadPageAndLog } = require("damp-test/tests/head");
  *          - {String} text: A string that should be in the message.
  *          - {Number} count: If > 1, indicate how many messages with this text should be
  *                            in the output.
+ *          - {Boolean} stacktrace: If true, wait for a stacktrace element to be rendered.
  */
 exports.reloadConsoleAndLog = async function(label, toolbox, expectedMessages) {
   const onReload = async function() {
@@ -36,11 +37,14 @@ exports.reloadConsoleAndLog = async function(label, toolbox, expectedMessages) {
       const messages = Array.from(consoleOutputEl.querySelectorAll(".message"));
       const missing = new Map(expected.map(e => [e.text, e.count || 1]));
 
-      for (const { text, count = 1 } of expected) {
+      for (const { text, count = 1, stacktrace } of expected) {
         let found = 0;
         for (const message of messages) {
           const messageText = message.querySelector(".message-body").innerText;
-          if (messageText.includes(text)) {
+          if (
+            messageText.includes(text) &&
+            (!stacktrace || message.querySelector(".frames .frame"))
+          ) {
             const repeat = message
               .querySelector(".message-repeats")
               ?.innerText?.trim();
@@ -97,7 +101,7 @@ async function waitForConsoleOutputChildListChange(hud, predicate) {
         resolve();
       }
     });
-    observer.observe(webConsoleOutputEl, { childList: true });
+    observer.observe(webConsoleOutputEl, { childList: true, subtree: true });
   });
 }
 exports.waitForConsoleOutputChildListChange = waitForConsoleOutputChildListChange;