Force-Enable Hardware Acceleration in Firefox on Linux

Before any steps, let’s check if GPU acceleration is already on.

1. Open about:support in Firefox.
2. Navigate to Graphics section.
3. Check the GPU Accelerated Windows field.

If it’s 1/1 or 1/2 or 2/2 or whatever, anyway, the first number must be greater than 0, then Firefox is already hardware accelerated. And you don’t need to take following procedures to force-enable it. Otherwise, let’s do a few modifications to force-enable the GPU acceleration in Firefox!