Kubuntu 14.04 64bit AMD A8-6500T Mesa 10.1.3 Since Firefox 30, while listening to a playlist on YouTube (background pinned tab), Firefox crashes after some random time. YouTube is set to prefer HTML5. Crash reports IDs: 9802acc4-869c-4a2b-8e75-240192140610 125b2378-0267-4fc2-b307-9bc4a2140611 b871e8c3-23ae-4a59-b0f0-0e6772140619 5d505192-8643-49de-8e10-140662140706 4b332b66-4f61-4d5c-97cb-680a52140707 e73ac42c-d052-44e0-a03f-042852140715 d2608732-0ec7-4169-ad91-5dad92140715 e511761e-b97a-499f-b22c-92b162140716 bcb11f63-cee2-41fd-b855-2d2512140720 d48b4600-0c0c-4bf1-b8be-36cb12140720 3c4b0253-fec5-4512-8ab6-27a442140721 07ab2fdc-ffec-49a7-8cac-47e8a2140729 26161576-77f3-43f9-ab8a-94d132140731 c0ca3165-5aae-4e12-8eb8-02cfc2140803 65d9957e-8f81-45a0-899d-fab752140805

A new crash on Firefox 32: da4ecadb-0455-44d3-aa60-85bd72140905 Although I reported this issue with a lot of related info, I will be happy help resolve/test this further. Any ideas?

Looking at: https://crash-stats.mozilla.com/query/?product=Firefox&version=ALL%3AALL&range_value=2&range_unit=weeks&date=10%2F18%2F2014+05%3A00%3A00&query_search=signature&query_type=contains&query=libavcodec.so&reason=&release_channels=&build_id=&process_type=any&hang_type=any It seems like there is a low volume of crashes in (ubuntu's?) libavcodec which would be from libav (as opposed to ffmpeg), which is being loaded by gstreamer. We don't seem to have symbols for these in crash-stats -- if someone who can reproduce this can catch the crash in gdb with the appropriate libav/gstreamer *-dev packages installed and get a full backtrace that would be helpful. A workaround might be setting media.gstreamer.enabled to false in about:config, but you would lose h264 support

gstreamer is going in bug 1234092