Fair, and this is why I hesitate to recommend LibreWolf as a true alternative to Firefox. It wasn’t meant to be the common man’s general browser. It was flavored with a privacy goal in mind and that’s what it does.
It’s a half-step toward recommending someone use Tor browser as a daily driver. Which wouldn’t work out very well. But it’s quite private and anonymous!
There just wasn’t a need/enough funding or drive for another “good enough” browser like Firefox, the answer for that was Firefox. Everyone else is off one deep end or another.
You are looking at the software, but how’s the hardware?
How old is the server? Could the thermal paste be old and dried up? Is the cooling fan working?
A CPU with bad cooling can still run, up to a threshold and then it will throttle itself to avoid going over, but since the cooling sucks just being on will keep it there.