Hi, please remove your email address as this is a public forum and it can be found by spammers and bots by going to the right of your question and use Edit. Firefox is a browser and not a search engine but can be used to connect with one. If you have forgotten your password then please follow instructions for passwords. If you can not reach your password for some reason try starting Firefox in Safe Mode. *https://support.mozilla.org/kb/Safe+Mode If none of the above is correct is that you need to supply more information as to what you are signing into, browser, Sync, something else like news letters, blogs, provide details please.