Firefox 4 nightly builds (and soon, betas) now include hardware acceleration on all versions of Windows! We would simply love it if you would help us test this acceleration.
To know if you’re using hardware acceleration, check the Graphics section of about:support. If your computer is capable of using content acceleration using Direct2D, you will see “Direct2D Enabled: true.” If your computer is capable of using layers/compositing acceleration using Direct3D 9, you will see “GPU Accelerated Windows: 2/2 Direct3D 9″ (for example).
To test if a problem you’re seeing is due to hardware acceleration, you can disable it. There are two ways to accomplish this:
- Run Firefox in safe mode. (All hardware acceleration is always disabled in safe mode.)
- Uncheck “Use hardware acceleration when available” in the Advanced section of the Preferences/Options dialog.
When reporting a bug caused by hardware acceleration, please copy the entire Graphics information block from about:support into your bug report. This will help us work out root causes and reproducing your problems.
In the very near future, we plan to enable layers/compositing hardware acceleration on Mac OS X using OpenGL. The same testing procedure works there, too, and we will even more gratefully accept your bug reports for hardware acceleration issues on OS X.
1. Due to some technical issues, each window can have a different hardware acceleration status, which is why we show a ratio. Most of the time all of your windows will be accelerated, though.