I have been “trying” Linux for the past 2 years and recently wanted to install it on a bigger ssd.
I installed the same distro I was using (Manjaro) and the same kernel version (5.15). I have a separate partition for / and /home. I copied all the config files from the old ~/.config and ~/.local into the new one. What I’m trying to say is that firefox settings are identical on both drives. The only difference between the old and new system is that I am using btrfs in the new one instead of ext4.
For some reason, hardware acceleration no longer works on the new build and causes the cpu of my laptop to go crazy. Hardware acceleration works fine on VLC or any other standard media player. I am able to verify this using intel_gpu_top, where the video column is stuck at 0 for firefox or any other browser. Any idea how to troubleshoot and get hardware acceleration back working in firefox?
Install intel-media-driver , libva-utils and add LIBVA_DRIVER_NAME=iHD in /etc/environment as root. Log out and log back in.Verify if runnning vainfo return some output or not. If it does then change these properties in about:config: