Work around Firefox 42 controls bug. #450

src/Images/ImageCommon.coffee

@@ -79,6 +79,15 @@ ImageCommon =
 
   # Add controls, but not until the mouse is moved over the video.
   addControls: (video) ->
+    # XXX https://bugzilla.mozilla.org/show_bug.cgi?id=1192302
+    if /Gecko\/20100101\ \w+\/42\./.test navigator.userAgent
+      video.controls = true
+      if doc.contains video
+        {parentNode, nextSibling, paused} = video
+        $.rm video
+        parentNode.insertBefore video, nextSibling
+        video.play() unless paused
+      return
     handler = ->
       $.off video, 'mouseover', handler
       # Hacky workaround for Firefox forever-loading bug for very short videos