If you're having problems with their multifactor really the only option is authenticating from a browser already logged in or using the backup codes...
what do you mean Firefox doesn't agree with your computer? You sounded like you didn't like Googled based (chromium). It's now either that or Firefox...
I'd say try again. Otherwise I don't know. I'd run all the test but at least the smart test and the long generic test. I don't know what the acoustic...
2nd ASUS X299 Apex/Intel i9-9940x with Custom water loop/7H-Prem-x64/Corsair 450D case/Ram Trident-z 3600C16 4x8gb / Samsung970Evo plus 500gb SSD/Dual ssd EZ swap evo/PSU EVGA SuperNova 1200w-P2 80+Platinum/GPU Titan Xp /8-ML-140 on push-pull on 2-280GTX rads