Backed out changeset e0a7ac3aee3d (bug 848939) for mochitest-1 failures on a CLOSED TREE.
Bug 849995 - Build with -Wsign-compare on clang; r=glandium

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extra : rebase_source : 34a800c1cabb3299967c58ecb00e7863a10808f8
Backed out changesets da71d1eb9521 and a174d3a0ce2e (bug 848939).
Bug 849460 - Use image-rendering: crisp-edges when upscaling favicons in Awesome Bar and bookmarks menus. r=dolske
Bug 850730 - Do not add browser handlers to about:blank. r=gavin
Bug 845592 - Adjust the New Window menu entries in permanent private browsing mode; r=gavin

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extra : rebase_source : aebca8d6686cdb0b0f8ee8ee44a743b9dfbe8c17
Bug 850446 - Fix NULL deref in StartOffThreadIonCompile(). r=bhackett
Bug 845372 - remove some debug stats from Signaling code r=jesup
Bug 850346 - Change inputmode to inputMode for nsHTMLInputElement. r=bz