Are you talking about the Password Manager filling in login information? Type '''about:preferences#security'''<enter> in the address bar. Under '''Logins, ''' Turn on '''Remember Logins. ''' To check the passwords you have listed, press '''Saved Logins. ''' '''Warning: ''' There are some web pages that do not allow browsers to record or fill in the log-in information. But if you go to the [https://addons.mozilla.org/en-US/firefox/ Mozilla Add-ons Web Page] {web Link} (There’s a lot of good stuff here) you can find several add-ons that can override this, and give you better control of your password information. You can also try a '''Form Filling''' add-on.