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You can easily migrate to any of the browser independent password managers: 1Password, BitWarden, LastPass, etc.

https://www.mozilla.org/en-US/firefox/switch/

lastpass has a lot of import / export options as far as I remember, so that might be a good place to start... but once you get them imported you should be able to export them to another service easily enough.

ive moved to bitwarden a few months ago and it is far superior and a lot less bloated than lastpass.