diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
index 75ddd579d0f4..500530063d4c 100755
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -8041,6 +8041,7 @@ var gIdentityHandler = {
       let menupopup = document.createElement("menupopup");
       let block = document.createElement("vbox");
       block.setAttribute("id", "identity-popup-popup-container");
+      menulist.setAttribute("sizetopopup", "none");
       menulist.setAttribute("class", "identity-popup-popup-menulist");
       menulist.setAttribute("id", "identity-popup-popup-menulist");
 
diff --git a/browser/themes/shared/notification-icons.inc.css b/browser/themes/shared/notification-icons.inc.css
index c2b140a10ba3..810435c54b43 100644
--- a/browser/themes/shared/notification-icons.inc.css
+++ b/browser/themes/shared/notification-icons.inc.css
@@ -157,7 +157,7 @@ html|*#webRTC-previewVideo {
 }
 
 .identity-popup-popup-menulist {
-  width: 72px;
+  min-width: 6.5em;
 }
 
 /* EME */