See if this helps: https://support.mozilla.org/en-US/questions/1580040#answer-1816244

Hmm, my reply isn't showing.

Ok this one worked. Try this:

about:config in address bar layers.gpu-process.enabled Set it to false, then restart Firefox.

WARNING from the moderator team: Changing Firefox preferences from the about:config page can sometimes break Firefox or cause strange behavior. You should only do this if you know what you're doing. Please read Firefox advanced customization and configuration options to learn more.

When I click the point to the screen game, the game reduces my DPI even though I've increased the game's sensitivity to a high. thanks. but it is not working

Hi

I would strongly recommend not changing about:config prefs.

Is this only happening in Firefox?

This happens when I use the mouse in full screen mode or click the point to Firefox games screen, and it automatically reduces my DPI to a slow level that's difficult to play. I tried the Chromium browser and it works fine. Is it a bug? I just restore my setting to default