Firefox has not hardware acceletration at all with proprietary drivers
After months of testing, I can't find any solution for this, Firefox has not hardware acceletration at all with proprietary drivers.
Installed latest ATi drivers from ATi official package, creating distro specific packages.
Downloaded Package: amd-driver-
Driver version: 8.97.100.
Hardware: Sapphire ATi Radeon HD4890 1GB DDR5 (It's ok for you to run Unity?, and what do you think Firefox?, It's ok?)
Using Ubuntu 12.04 LTS (yes, lts, shouldn't be ok with hardware acceleration?, and yes, Firefox is part of the standar bundled software!)
Maybe this threads can support this bug report to get it fixed ASAP
Really poor performance after opening some programs (ATi HD4890 Gallium 0.4)
Video Accelleration OK, but Firefox performance quite poor!
Mozilla Firefox 12 is very slow on Ubuntu 12.04 LTS.