Johnny Hughes wrote:
The Red Hat engineers disabled the ffmpeg capability of firefox a couple releases back due to stability issues. CentOS also has removed it as for our main repositories, we build the source code for RHEL with as few changes for branding/artwork as we can.
That said, we (I :D) want a firefox with ffmpeg support available, therefore I have created a centosplus version of firefox that has ffmpeg enabled starting with version 45.4.0-1, released to the repositories a few minutes ago. You can get it from the CentOS Plus Repository:
https://wiki.centos.org/AdditionalResources/Repositories/CentOSPlus
Thank you very much, Johnny, both for the addition, and for letting us know.
mark