Playing the video at https://browserid.org/users reliably crashes my MacOSX nightly build. Crash address looks random, so this might be exploitable. https://crash-stats.mozilla.com/report/index/bp-a32bd99f-d985-46f4-ba3f-7ce132110714
If this is a dupe of bug 670573 then Firefox 5 and 6 should not be affected. qawanted: test this video on Firefox 5, 6, and 7
Tested this video using: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:5.0.1) Gecko/20100101 Firefox/5.0.1 Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:6.0) Gecko/20100101 Firefox/6.0 Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:7.0a2) Gecko/20110804 Firefox/7.0a2 and was not able to crash playing the video.
And this should be resolved everywhere because bug 670573 landed on mozilla-central and mozila-aurora and mozilla-beta was unaffected. If it still happens anywhere it isn't a strict dupe of bug 670573. Clearing the tracking for Firefox 6.
qa- as QA was unable to reproduce this bug originally. Andreas, please verify this bug is fixed in Firefox 7 and 8.