Normally when you install Firefox this feature is turned on by default. You can check the status in the Options dialog: orange Firefox button (or Tools menu) > Options > Security tab In the second section, there's a checkbox for "Remember passwords for sites". These articles have more information: * [[Password manager - Remember, delete and change saved passwords in Firefox]] * [[Use a Master Password to protect stored logins and passwords]] Now... some sites add code to the fields on their forms to block autocompletion (which also blocks saving logins), so you may find some sites where Firefox will not offer to save the password for this reason. There may be workarounds, as have been discussed many times for Yahoo! mail, for example, but since these are lengthy to describe, please post back if the problem is site-specific and if possible provide a link to the login form.