Steps To Reproduce: 1. Open about:home in [Tab 1] 2. Open http://edition.cnn.com in [Tab 2] and play back any flash video (eg. http://edition.cnn.com/2014/11/23/showbiz/music/katy-perry-super-bowl/index.html?hpt=en_bn1) 3. Switch to [Tab 1] 4. Resize browser window (reduce width and then enlarge width) Actual Results: Flash player of [Tab 2] displays on the wrong tab [Tab 1] Expected Results: Flash video should not display on the unrelated tab

Alternative Steps To Reproduce: 1. Open about:home in [Tab 1] 2. Open http://edition.cnn.com in [Tab 2] and play back any flash video (eg. http://edition.cnn.com/2014/11/23/showbiz/music/katy-perry-super-bowl/index.html?hpt=en_bn1) 3. Switch to [Tab 1] 4. Open sidebar and close (ie. Press Ctrl+B twice)

Regression window(m-c) Good: https://hg.mozilla.org/mozilla-central/rev/66cdb18f36da Mozilla/5.0 (Windows NT 6.1; WOW64; rv:36.0) Gecko/20100101 Firefox/36.0 ID:20141112125012 Bad: https://hg.mozilla.org/mozilla-central/rev/ab137ddd3746 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:36.0) Gecko/20100101 Firefox/36.0 ID:20141113030201 Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=66cdb18f36da&tochange=ab137ddd3746 Regressed by: 64f1fb1e2f38 Jim Mathies — Bug 669200 - Follow up fix for busted non-unified builds, include nsIXULRuntime.h in nsWindowGfx.cpp. r=bustage

Alice, is this still reproducible? It sounds like it might be a dupe of bug 1133237.

(In reply to Bill McCloskey (:billm) from comment #4) > Alice, is this still reproducible? It sounds like it might be a dupe of bug > 1133237. I can still reproduce the problem, https://hg.mozilla.org/mozilla-central/rev/385840329d91 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0 ID:20150329030238

(In reply to Alice0775 White from comment #5) > (In reply to Bill McCloskey (:billm) from comment #4) > > Alice, is this still reproducible? It sounds like it might be a dupe of bug > > 1133237. > > I can still reproduce the problem, > > https://hg.mozilla.org/mozilla-central/rev/385840329d91 > Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0 > ID:20150329030238 Err, I saw a different problem