If you are using AVG or ESET Internet Security, it needs a certificate from you and might be causing Firefox to request for a Primary Password from you when you start Firefox every time. To resolve this problem, you must first deactivate your Primary Password and then reactivate it: 1) Click the menu button -> Select Options. 2) Select Privacy & Security -> Scroll down -> Select Logins and Passwords Section. 3) Uncheck the box beside the Use a Primary Password -> Enter the current password. 4) Click Remove -> Click OK -> Appear a dialog to confirm it has removed the Primary Password. 5) Close Firefox. 6) Repeat Step 1 & Step 2. 7) Select the checkbox beside the Use a Primary Password to reactivate it -> Enter a new password ( You can use your previous password or a new one also can). 8) Close Firefox. - It should not request for a Primary Password from you when you start Firefox later unless it is needed. You can see also: ~ Forgotten your Primary Password -> Link (https://support.mozilla.org/en-US/kb/reset-your-primary-password-if-youve-forgotten-it). ~ More information on the Primary Password -> Link (https://support.mozilla.org/en-US/kb/use-primary-password-protect-stored-logins).