For some reasons, Firefox still not using OpenGL for compositing by default, and that can result sluggish scrolling and / or high CPU usage in many places, like youtube. Meanwhile, compositing runs on the GPU in Windows by default.
To check compositing status of your Firefox, just type about:support into the address bar and press enter. Scroll down to “Graphics” section, where you will see this:
- Compositing Basic
That means no GPU acceleration… But you can activate it simply!
Type about:config into the address bar, and press enter. Then search for this key:
Switch it’s value to true, by double clicking on it. Then close this tab and restart the browser.
Now you can see this on about:support:
- Compositing OpenGL
And that’s all. You shoud feel the difference by now.