Hi This support article should help you to update Firefox: https://support.mozilla.org/en-US/kb/update-firefox-latest-release

You posted with Google Chrome with a ChromeOS (CrOS) useragent. *Mozilla/5.0 (X11; CrOS x86_64 14092.77.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.107 Safari/537.36 Are you using Firefox on such a device ? Is this an ARM chromebook or an Intel/AMD chromebook? *https://www.techradar.com/how-to/how-to-install-firefox-on-a-chromebook *https://www.techrepublic.com/article/how-to-run-firefox-quantum-on-a-chromebook/