Backup like guru's above mentions, Macrium/Veeam etc good choises. Firefox user... so consider NoScript addon for extra layer. No password manager needed if you have VERY good memory (like i have, hehehe!) or pen and piece of paper.(paranoia). OD scanner, you could consider, like NPE or something like guru's above already mention. (zemana/NPE= good combo).
Thanks for sharing, stay safe!