Firefox ერთობის განხილვა

Hi everyone I have Firefox 110. My husband installed it on my laptop. He died 2 years ago :( It does not automatically update. I can't update because I don't have his administrator password. Or any other useful passwords :( And I have never done anything geekish before; I am only a user. Please can anyone explain in words my mother would understand what to do with the Firefox 136 .tar file. Or even better how to work around permissions so I can get automatic updates. Pete and I worked together well to set up www.pcurtis.com but I never learned the systems stuff - I never needed to when he was alive. I am a retired academic. Anyone in the Oxford UK area who could help would be really useful. As an emergency I have just started to use the Opera browser he installed but I have no passwords for that either.... Pauline