Hello, Are you referring to your Mozilla account? If so, please try [[Clear cookies and site data in Firefox | clearing cookies and data]] for https://accounts.firefox.com/.

I also did a clean win11 reinstall and now am unable to log into firefox browser. if I click the "Sign In" box it takes me to "https://accounts.firefox.com/?context=blablaandsoonwithmoreformilesandmilesandthisandthatandtheotherwithmoresymbolsandallthatjunk" I enter my email click the "Sign up or sign in" button I get a white page, Mozilla in the top left and in the center it says "Bad Request" "Incorrect redirect_uri" Now if I delete all the extra and go to accounts.firefox.com, I enter my email. then it goes to password page. I enter my password and it says "Unexpected error" *Edit; I tried switching internet connection to a different internet provider. no luck. **EDIT; I did a format and reinstall of windows. same problem. ***Edit; with my new install, I again switched internet and it worked.