Anecdotally, I know that in my case I use librewolf and it by default disables webgl for privacy reasons. There was a toggle in the settings to turn it on. Unsure if that’s your issue or not but thought I’d mention it.

My suggestion would be games with community run servers. They often moderate their own servers, and therefor much less cheating.

Now, my two recommendations might not be for everyone. Arma Reforger and Squad. Squad used to be a solid recommendation from me, but they fucked with the gun handling as well as ruined performance. So it’s a light recommendation.

Arma Reforger is a great time.

You might also check out DayZ. They also have community servers which are moderated, and they’re really good at catching cheaters.