I have an nVidia GPU, and it shows slight less load in Firefox compared to Chrome. No special settings there. Install nVidia drivers, install Firefox, there's

I have an nVidia GPU, and it shows slight less load in Firefox compared to Chrome. No special settings there. Install nVidia drivers, install Firefox, there's no step three. Both use the GPU itself rather than the video engine. If you want to use the Video Engine of the GPU, you need to use something like VLC.