diff -urN firefox-156.0-orig/browser/components/search/content/searchbar.js firefox-156.0/browser/components/search/content/searchbar.js
--- firefox-156.0-orig/browser/components/search/content/searchbar.js	2026-09-10 05:41:31 +0900
+++ firefox-156.0/browser/components/search/content/searchbar.js	2026-09-17 04:11:45 +0900
@@ -562,7 +562,7 @@
      * Determines if we should select all the text in the searchbar based on the
      * searchbar state, and whether the selection is empty.
      */
-    _maybeSelectAll() {
+    _maybeSelectAll() { return;
       if (
         !this._preventClickSelectsAll &&
         document.activeElement == this._textbox &&
diff -urN firefox-156.0-orig/browser/components/urlbar/content/UrlbarInputBase.mjs firefox-156.0/browser/components/urlbar/content/UrlbarInputBase.mjs
--- firefox-156.0-orig/browser/components/urlbar/content/UrlbarInputBase.mjs	2026-09-10 05:41:31 +0900
+++ firefox-156.0/browser/components/urlbar/content/UrlbarInputBase.mjs	2026-09-17 04:14:50 +0900
@@ -5352,7 +5352,7 @@
    * Determines if we should select all the text in the Urlbar based on the
    *  Urlbar state, and whether the selection is empty.
    */
-  #maybeSelectAll() {
+  #maybeSelectAll() { return;
     if (
       !this.#preventClickSelectsAll &&
       this.#compositionState != UrlbarShared.COMPOSITION.COMPOSING &&