After the upgrade my MacPro had a pink screen which seems to have disappeared. In Firefox there are no sliders, the material on the screen has been expanded beyond recognition and the system has become unuseable. Probably not a Firefox issue, but the Catalina upgrade should definnitely be postponed.
Additional System Details
- User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0