--- a/browser/base/content/fullscreen-video.xhtml
+++ b/browser/base/content/fullscreen-video.xhtml
@@ -133,16 +133,20 @@ window.addEventListener("unload", functi
     contentVideo.muted = video.muted;
     if (!video.paused && !video.ended) {
       video.pause();
       contentVideo.play();
     }
   }
 }, false);
 
+window.addEventListener("deactivate", function () {
+  window.close();
+}, false);
+
 window.addEventListener("keypress", function (event) {
   if (event.keyCode == event.DOM_VK_ESCAPE) {
     window.close();
     return;
   }
 
   resetIdleTimer();