Hi, your Firefox reported itself to be version 126 on Windows 10. Old versions had a certificate which expired last Friday, so they can't verify extensions any more. Can you upgrade a couple versions to resolve this issue? If you want the minimum amount of change, the Extended Support of Firefox 128 would be your best choice. See: * Get your installer: https://www.mozilla.org/firefox/all/desktop-esr/ * About ESR: [[Choose a Firefox update channel]] * Why this is needed: [[Update Firefox to prevent add-ons issues from root certificate expiration]] Does that work?