Hi DeltaMail, if you use the official Firefox uninstaller, it doesn't remove your data files, so when you reinstall, Firefox locates and re-uses that same folder. You may notice the installer mentioning an update instead of a new installation. User names could be saved in three different places: (1) Password Manager (2) Form history (3) A cookie set by the website (either in the cookie, or retrieved from the site using the cookie) To check on #1: * Windows: "3-bar" menu button (or Tools menu) > Options * Mac: "3-bar" menu button (or Firefox menu) > Preferences * Linux: "3-bar" menu button (or Edit menu) > Preferences * Any system: type or paste '''about:preferences''' into the address bar and press Enter/Return to load it In the left column, click "Privacy & Security". Then on the right side, scroll down to the '''Logins & Passwords''' section. Click the "Saved Logins" button. Here you can view/edit passwords ("Show Passwords" button) or delete logins completely. To check on #2, unfortunately, there's no similar list of saved form history entries. But if you turn off form history then Firefox would stop suggesting it. If you want to try that, let me know. Also, you can delete form history entries by using the keyboard: press the down arrow to select it and then press the Delete key. For #3, Google would usually display a nicer account chooser screen, so perhaps this wasn't the explanation. Hard to say.