Go to Tools | Options and choose the Security tab from the Options dialog. Check the "Remember passwords for sites" checkbox. Click the Exceptions button to make sure the site you want to remember is not listed.

From that point on, Firefox will record the username and password combination you enter for a site provided it can recognized those fields in the website form. If the username and password are not already recorded for that site, a bar will expand down at the top of the webpage below the page tabs asking you if you want to remember or ignore that new information. Clicking the Remember button will record that information for that site. When you visit that same form again, either the single recorded username and password should automatically appear in the form fields, or a drop-down list of choices will appear when you set the focus to that field. The choices can be filtered by typing the first letters.

If the "Save password" checkbox you mentioned is displayed on the webpage, it is not a part of Firefox and is a function of the webpage of that site, so it does not affect the ability of Firefox to remember usernames and passwords for a particular site.

• Make sure that you not run Firefox in Private Browsing - Use Firefox without saving history mode
• You are in Private Browsing mode if you see "Tools > Stop Private Browsing", possibly grayed

• You enter Private Browsing mode if you select: Tools > Options > Privacy > History: Firefox will: "Never Remember History"
• To see all History settings, choose: Tools > Options > Privacy, choose the setting Firefox will: Use custom settings for history
• Uncheck: [ ] "Automatically start Firefox in a private browsing session"

See also:

• Always start Firefox in a private browsing session