09:10:35 INFO - INFO TEST-END | chrome://mochitests/content/browser/browser/components/customizableui/test/browser_876926_customize_mode_wrapping.js | finished in 6690ms 09:10:35 INFO - TEST-INFO | checking window state 09:10:35 INFO - TEST-INFO | chrome://mochitests/content/browser/browser/components/customizableui/test/browser_876926_customize_mode_wrapping.js | must wait for focus Followed by a bunch of places failures, followed by a shitload of: 09:16:08 INFO - TEST-INFO | chrome://mochitests/content/browser/browser/components/customizableui/test/browser_876926_customize_mode_wrapping.js | Console message: [JavaScript Error: "DEPRECATION WARNING: Field 'creationDate' is deprecated. followed by a timeout crash (?) 09:21:40 WARNING - TEST-UNEXPECTED-FAIL | chrome://mochitests/content/browser/browser/components/customizableui/test/browser_876926_customize_mode_wrapping.js | application timed out after 330 seconds with no output And everything goes sadfaces. I'll look at this more tomorrow, but if anyone knows what's wrong sooner than I do, then feel free. If anyone thinks it's urgent/necessary to back out what caused this, please back out bug 876926 only (not the followup I already landed that otherwise fixed the orange, which fixes other bugs, too). Example log: https://tbpl.mozilla.org/php/getParsedLog.php?id=27930962&tree=UX

Adding keyword so that TBPL can suggest this bug.

I just landed this, and verified locally that it fixes the timeout, which is apparently caused by our Windows focus code not dealing with opening a window, opening a panel in it, and then closing the parent window (and thereby the panel). So we end up with a nulled out activeWindow in the focus manager, which broke the test flow. I'll file a followup bug on our focus code regarding this if one doesn't already exist.

Filed bug 917294 for the underlying focus issue. This issue has gone away with the patch I landed, so closing this as FIXED.