Hi JGomes919, are you using Firefox's password manager to remember your login? Firefox's password manager will drop down a panel from the address bar to ask whether you want to save the login. (More info: [[Password Manager - Remember, delete, change and import saved passwords in Firefox]]) If you are using the site's own feature to "remember" you, that involves setting a persistent cookie on your browser. By persistent, I mean it has an expiration date in the future rather than expiring when you exit Firefox. Firefox sends the cookies a site sets back to the site with future requests, so that is how the site can recognize that you already logged in. In regular (non-private) mode with standard cookie settings, that should work flawlessly. However, private browsing, changing Firefox's privacy settings, using add-ons that affect cookies, or using utility/cleaning software that removes browser data can all remove that cookie. So it might take a little work to track down the source of the issue. Note: Firefox also has a form history feature to remember previous entries into forms. This may not always work with the username part of login forms, it seems inconsistent; it doesn't store history for fields identified as type="password".