Bug 939084 - Intermittent browser_social_chatwindow_resize.js, r=felipe

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extra : rebase_source : 4a9bc4113584492fd9ff76dd58824d0d13d6b4ff
Bug 943793 - Intermittent TEST-UNEXPECTED-FAIL | chrome://mochitests/content/browser/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_localStorage.js, r=ehsan

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extra : rebase_source : 75935389529158eaffbeed6e9f659785858ecd88
Bug 945979 - Intermittent browser_privatebrowsing_geoprompt.js, r=ehsan

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extra : rebase_source : 2ccc3019b9912e34fc20824cbed6fee943d962e4