Background color and update choice!

I am disappointed with the background change with updates. The last time I updated Firefox, I had to do a system recovery to revert back. Then another person expressed concerns with a new version taking control over updating. Why don't you have updates that give you options to choose the background color and who decides if and when you update? I will not update Firefox under these conditions. And I don't want to spend half a day trying to change my background back to white, and especially if would have to do that with every update. Like I have to change my printing options when I do updates! I have been so happy with Firefox for the last 20 yrs. or so, until all of this. Please make this more user friendly and optional.