Bug 1816139 - Undo focus mitigation from bug 1421724. r=karlt

Differential Revision: https://phabricator.services.mozilla.com/D169786

browser/base/content/test/webrtc/head.js

@@ -388,9 +388,6 @@ function promiseMessage(
 function promisePopupNotificationShown(aName, aAction, aWindow = window) {
   let startTime = performance.now();
   return new Promise(resolve => {
-    // In case the global webrtc indicator has stolen focus (bug 1421724)
-    aWindow.focus();
-
     aWindow.PopupNotifications.panel.addEventListener(
       "popupshown",
       function() {