Bug 1016611 - Part 1: don't process distribution files for webapp profiles. r=margaret
Bug 1016611 - Part 2: further cleanup. r=margaret
Bug 1016611 - Part 3: basic thread safety in GeckoProfile. r=margaret
Bug 1016611 - Part 4: fix testBookmarksPanel. r=margaret
Bug 1016611 - Part 5: be resilient against failed insertions. r=margaret