Firefox updated automatically & it seems slower. All my add-ons remained the same but there's all this new stuff floating around & I hate all these changes. We had our internet upgraded last week; it was lightning fast. Today Firefox updated and it's slower & weird. How do I go back to the previous version while also keeping my previous settings?

(I've said it a thousand times as many others have--why does it have to change? It was FINE!!)