Bug 894796 - Ignore about:blank loads for gfx recording to prevent prematurely closing the window. r=Bas

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extra : rebase_source : 05e49e728cc6696b2d15cda67548ac86140d9fe2
Bug 899440 - Add localisation comment for search-with-selection context menu item r=margaret.leibovic

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extra : rebase_source : 4bd8613dd24fb5034ae995ea1d9323e1360bbf10
Bug 777517 - Webapp installation alert should launch app on click. r=myk