Recently Firefox has been acting very strange -- opening old pages instead of new ones, not opening on the set home page and links that I click on in emails, other pages, etc. go to old page viewed instead of proper link. Not sure what is happening. I did refresh Firefox. I also deleted the app and installed again but it just went back to the same old pages/issues. Is this because I haven't upgraded Apple software to Big Sur? Any help is greatly appreciated. Thank you.