I can't speak for Firefox, but Google Chrome (and presumably anything Chromium-based) has working hardware-accelerated video on AMD and Intel GPUs.
It does admittedly take some effort to set up; I assume Google is hesitant to enable it by default because of issues with Nvidia GPUs. But when configured, it works and has for years.
It does admittedly take some effort to set up; I assume Google is hesitant to enable it by default because of issues with Nvidia GPUs. But when configured, it works and has for years.