I've been a user of 1Password for close to a decade now. I was so happy that they made 1Password X for Firefox. I had previously used their browser extensions on Mac and Windows and I knew the integration is stellar. 1Password X did not disappoint. It helps me create unique, strong passwords for every site, auto-fills my credentials upon asking me (without any significant number of false positives, which is exceptionally rare among password managers) and even handles the 6-digit TOTP TFA codes for me. When I had a technical question about the encryption used its developers were more than happy to address it than waving me off or giving me a market-drone reply. That was impressive and what truly sold me; you get to talk to the developers if you have a problem, not some script-reading, underpaid kid packed in a sardine can sized cube halfway across the world. But I digress. The features of 1Password X are well worth the small annual fee, especially if you go for their family plan.