I think you mean you're disappointed with Firefox on macOS? If so, my experience has been the same, though I have been sticking with it for now. I often find

I think you mean you're disappointed with Firefox on macOS? If so, my experience has been the same, though I have been sticking with it for now. I often find I have to close out Firefox and restore my session to stop it from churning so hard my fans spin. This is particularly true after it has been running for a while or after resuming from suspend.