Make sure that "Remember logins for sites" doesn't have a checkmark.

• Options/Preferences -> Security: Logins: [ ]"Remember logins for sites"

• https://support.mozilla.org/en-US/kb/password-manager-remember-delete-change-passwords

where in the world would i find remember logins for sites, its not in the drop down window my options have no such thing as preferences and I'm really frustrated with these sign in log ins remembering every name i type in, please I have windows vista and using firefox.ALL I CAN SAY IS HELP!!!

Did you look at the article?

It's in Options that you can find in the "3-bar" Firefox menu button drop-down list. In Options, go to the Security tab. There you will find "Remember logins for sites"

See also "Viewing and deleting passwords":

• https://support.mozilla.org/en-US/kb/password-manager-remember-delete-change-passwords

ok, I checked the security tab and the options (remember logins for sites) is not checked but i also clicked save logins and theres nothing there, so how is it still happening, I re-downloaded firefox and its till remembering the logins, I AM LOSING MY MIND !! please find a sollution. thanks

Would you try this please :

3-bar menu (or 'Tools') => Options => Privacy => choose Firefox will : 'Use custom settings for history' and check : 'Always use Private Browsing mode'

A detail like a website remembering you (log you in automatically) is stored in a cookie. Remove the cookies from a website to make the website forget about you.

"Remove the cookies" from websites that cause problems.

• Options/Preferences -> Privacy -> "Use custom settings for history" -> Cookies: "Show Cookies"