You can record your screen for videos or take printscreens. First, you need to find Use graphics acceleration when available (or hardware acceleration) in your browser settings (under system or something like that) and disable it, restart your browser.
Then you can take printscreens easily. If you want to record a video, you can use OBS studio that is free and simple to use.
Don't forget to activate your graphics acceleration setting back when you don't record your screen.
There is probably a way to record it in source quality, but I don't know how to do it.