Comment # 6 on bug 1226383 from Adam Reichold

And now I cannot reproduce it either.

I think there were updated packages shipped by Packman after I wrote this, so I
suspect it was an issue with libavcodec61 rather than Firefox and I just
noticed it with Firefox because it is the only application which regularly
encounters H.264 on my system. This would also fit with the Mozilla binaries
not working either.

Sorry for the noise.s would also fit with the Mozilla binaries not working
either.

Sorry for the noise.