Bug 1886082, r=Gijs,emilio

Differential Revision: https://phabricator.services.mozilla.com/D207253

Author: Trikolon

toolkit/modules/PopupNotifications.sys.mjs

@@ -1939,10 +1939,14 @@ PopupNotifications.prototype = {
     }
 
     if (type == "buttoncommand" || type == "secondarybuttoncommand") {
-      if (Services.focus.activeWindow != this.window) {
+      // TODO: Bug 1892756.
+      if (
+        Services.focus.activeWindow != this.window ||
+        notificationEl.matches(":-moz-window-inactive")
+      ) {
         Services.console.logStringMessage(
           "PopupNotifications._onButtonEvent: " +
-            "Button click happened before the window was focused"
+            "Button click happened before the window was focused / active"
         );
         this.window.focus();
         return;