diff --git a/src/components/app/ProfileFilterNavigator.tsx b/src/components/app/ProfileFilterNavigator.tsx
index 936fd8003d..dd1041d4da 100644
--- a/src/components/app/ProfileFilterNavigator.tsx
+++ b/src/components/app/ProfileFilterNavigator.tsx
@@ -20,7 +20,7 @@ import {
 import { getTabFilter } from 'firefox-profiler/selectors/url-state';
 import { getFormattedTimelineValue } from 'firefox-profiler/profile-logic/committed-ranges';
 import { FilterNavigatorBar } from 'firefox-profiler/components/shared/FilterNavigatorBar';
-import { Icon } from 'firefox-profiler/components/shared/Icon';
+import { PageSelectorIcon } from 'firefox-profiler/components/shared/PageSelectorIcon';
 import { TabSelectorMenu } from '../shared/TabSelectorMenu';
 
 import type {
@@ -94,7 +94,10 @@ class ProfileFilterNavigatorBarImpl extends React.PureComponent<Props> {
       const itemContents = pageData ? (
         <>
           {/* Show the page data if the profile is filtered by tab */}
-          {pageData.favicon ? <Icon iconUrl={pageData.favicon} /> : null}
+          <PageSelectorIcon
+            favicon={pageData.favicon}
+            origin={pageData.origin}
+          />
           <span title={pageData.origin}>
             {pageData.hostname} (
             {getFormattedTimelineValue(
diff --git a/src/components/shared/PageSelectorIcon.tsx b/src/components/shared/PageSelectorIcon.tsx
new file mode 100644
index 0000000000..94056fd8b6
--- /dev/null
+++ b/src/components/shared/PageSelectorIcon.tsx
@@ -0,0 +1,31 @@
+/* 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 { Icon } from './Icon';
+import ExtensionFavicon from '../../../res/img/svg/extension-outline.svg';
+import DefaultLinkFavicon from '../../../res/img/svg/globe.svg';
+
+type Props = {
+  readonly favicon: string | null;
+  readonly origin: string;
+};
+
+/**
+ * PageSelectorIcon wraps the Icon component and provides fallback icons
+ * for pages that don't have a favicon in the profile data.
+ *
+ * Fallback logic:
+ * - If favicon exists (Firefox 134+ provides base64 data URI), use it
+ * - If origin is moz-extension://, fallback to extension-outline.svg
+ * - Otherwise (regular pages, about: pages), fallback to globe.svg
+ */
+export function PageSelectorIcon({ favicon, origin }: Props) {
+  const iconUrl =
+    favicon ??
+    (origin.startsWith('moz-extension://')
+      ? ExtensionFavicon
+      : DefaultLinkFavicon);
+
+  return <Icon iconUrl={iconUrl} />;
+}
diff --git a/src/components/shared/TabSelectorMenu.tsx b/src/components/shared/TabSelectorMenu.tsx
index 59101c23a3..0f493b04d0 100644
--- a/src/components/shared/TabSelectorMenu.tsx
+++ b/src/components/shared/TabSelectorMenu.tsx
@@ -11,7 +11,7 @@ import explicitConnect from 'firefox-profiler/utils/connect';
 import { changeTabFilter } from 'firefox-profiler/actions/receive-profile';
 import { getTabFilter } from '../../selectors/url-state';
 import { getProfileFilterSortedPageData } from 'firefox-profiler/selectors/profile';
-import { Icon } from 'firefox-profiler/components/shared/Icon';
+import { PageSelectorIcon } from 'firefox-profiler/components/shared/PageSelectorIcon';
 
 import type { TabID, SortedTabPageData } from 'firefox-profiler/types';
 import type { ConnectedProps } from 'firefox-profiler/utils/connect';
@@ -73,7 +73,10 @@ class TabSelectorMenuImpl extends React.PureComponent<Props> {
               'aria-checked': tabFilter === tabID ? 'false' : 'true',
             }}
           >
-            <Icon iconUrl={pageData.favicon} />
+            <PageSelectorIcon
+              favicon={pageData.favicon}
+              origin={pageData.origin}
+            />
             {pageData.hostname}
           </MenuItem>
         ))}
diff --git a/src/profile-logic/profile-data.ts b/src/profile-logic/profile-data.ts
index 21af66fcd8..97525c5502 100644
--- a/src/profile-logic/profile-data.ts
+++ b/src/profile-logic/profile-data.ts
@@ -35,8 +35,6 @@ import {
   numberSeriesFromDeltas,
   numberSeriesToDeltas,
 } from 'firefox-profiler/utils/number-series';
-import ExtensionFavicon from '../../res/img/svg/extension-outline.svg';
-import DefaultLinkFavicon from '../../res/img/svg/globe.svg';
 
 import type { StringTable } from 'firefox-profiler/utils/string-table';
 import type {
@@ -3307,7 +3305,7 @@ export function extractProfileFilterPageData(
       pageDataByTabID.set(tabID, {
         origin: pageUrl,
         hostname: pageUrl,
-        favicon: DefaultLinkFavicon,
+        favicon: null,
       });
       continue;
     }
@@ -3321,12 +3319,11 @@ export function extractProfileFilterPageData(
     // moz-extension:// protocol on platforms outside of Firefox. Only Firefox
     // can parse it properly. Chrome and node will output a URL with no `origin`.
     const isExtension = pageUrl.startsWith('moz-extension://');
-    const defaultFavicon = isExtension ? ExtensionFavicon : DefaultLinkFavicon;
     const pageData: ProfileFilterPageData = {
       // These will be used as a fallback if the urls have been sanitized.
       origin: pageUrl,
       hostname: pageUrl,
-      favicon: currentPage.favicon ?? defaultFavicon,
+      favicon: currentPage.favicon ?? null,
     };
 
     try {
diff --git a/src/test/unit/profile-data.test.ts b/src/test/unit/profile-data.test.ts
index 1d4a47ec5b..6b1f3ef34e 100644
--- a/src/test/unit/profile-data.test.ts
+++ b/src/test/unit/profile-data.test.ts
@@ -1301,7 +1301,7 @@ describe('extractProfileFilterPageData', function () {
         {
           origin: 'about:blank',
           hostname: 'about:blank',
-          favicon: 'test-file-stub',
+          favicon: null,
         },
       ],
     ]);
diff --git a/src/types/profile-derived.ts b/src/types/profile-derived.ts
index 3ee00c355b..c37e45319e 100644
--- a/src/types/profile-derived.ts
+++ b/src/types/profile-derived.ts
@@ -696,7 +696,7 @@ export type InitialSelectedTrackReference = HTMLElement;
 export type ProfileFilterPageData = {
   origin: string;
   hostname: string;
-  favicon: string;
+  favicon: string | null;
 };
 
 /**