Caution!

After Microsoft switched to Chromium as its code base for Edge, I left Firefox in the dust. The organization turned unnecessarily political and ideological, and as various security and privacy concerns were raised, I decided it was no longer worth my time.

To date, Firefox continues to store passwords in an insecure fashion: if someone has access to your logged-in session (like someone using your computer at work or school), they can easily access your passwords.

All Chromium-based browsers, including Edge, make use of the operating system's secure password storage - this is called Credential Manager in Windows and the Keychain in MacOS. Revealing passwords requires the logged-in user's password.

I strongly advise against continuing to use Firefox in any capacity. It isn't secure and will not keep your online account passwords secure.