I ask this seriously, and kindly, and with an offer of help... Do you have any idea what you're doing?
Reason is, what you said is roughly the same as saying you tried out a new Chevy, but you call the car a PITA and say you're "going back to Zenith" because the radio doesn't sound good. The radio is not the car... and besides, Firefox runs perfectly fine in Windows 10.
So I'm inclined to join rarestia is hoping that you're just trolling... :-) What's up?
Goctha. Apparently it was the Firefox, I uninstalled it, then downloaded it again and it’s working better.