the last few firefox updates are messing with windows graphics settings and not just firefox browser, it took weeks to get my windows settings back, to keep this from happening again i had to remove firefox when it updated without my permission, and b4 it messed further with windows settings i removed ff all together,,i re-installed version 100.0,,,,,i typically have 4 to 5 ff windows open and 20+ tabs in each,,i lost all of those, bookmarks, i only got bookmarks back by syncing to a second pc minus 2 months,,still missing all the windows/tabs,, if i cant prevent ff from updating i will have to find another browser to use, there is no absolute button in settings to prevent updates if ff is restarted, there isnt even a button to prevent downloading updates without express permission.