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