If install and use Aurora 30.0a2 (2014-04-04) on the same PC, i could no see again H264/MP4
In attachement, for information, libav-tools ** Attachment added: "apport_libav-tools" https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1051559/+attachment/4067315/+files/apport_libav-tools -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1051559 Title: Build Firefox with GStreamer 1.0 support Status in The Mozilla Firefox Browser: Fix Released Status in “firefox” package in Ubuntu: Triaged Status in “iceweasel” package in Debian: Fix Released Status in “firefox” package in Fedora: Unknown Bug description: Building Firefox with GStreamer support would provide support for a lot of websites that use h264. To build Firefox with GStreamer support you should use the "--enable-gstreamer" option. To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1051559/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp