If I, for example use Google as search engine, it always requires me to accept cookies. Then if I have accepted the cookies and go to one of the found pages, read it and go back to the search, Firefox tries to load the same popup window again, but fails. When I open a new tab and reenter the search phrase, the same window for accepting cookies appears. I think this problems have appeared after the latest update to version 82.0.3; not sure if I have changes some preference. My compter is an old MacBookPro with OS 10.13.6. In previous versions, I have been asked now and then to accept google's privacy rules. The similar problems appears for other sites, for example sanoma.com, where I have chosen to accept only the necessary cookies, not third party, analytics, etc. When I open a link and go back, the same question appears again, but for these sites it does not hang up, as in the google case. I mostly use private browsing window, and have better privacy and similar extensions activated.