Looking for logging into the Firefox Com site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Firefox Com site. After that you can login as usual with your login credentials.
https://www.mozilla.org/en-US/firefox/accounts/
https://support.mozilla.org/en-US/kb/how-do-i-set-sync-my-computer
https://addons.mozilla.org/firefox/users/login
https://play.google.com/store/apps/details%3Fid%3Dorg.mozilla.firefox%26hl%3Den_US
https://help.getpocket.com/article/1046-cant-save-to-pocket-in-firefox-asked-to-log-in-every-time
https://help.salesforce.com/HTViewSolution%3Fid%3D000004607
https://stackoverflow.com/questions/48646867/is-google-sign-in-not-supported-on-firefox
https://www.accessfirefox.org/
https://github.com/bitwarden/browser/issues/580
https://www.digitaltrends.com/computing/firefox-60-supports-webauthn-password-free-logins/
https://www.techsupportalert.com/content/lastpass-not-working-firefox-its-not-just-you.htm
https://www.theverge.com/2018/4/10/17215406/webauthn-support-chrome-firefox-edge-fido-password-free
http://www.google.ie/url?url=http://forums.mozillazine.org/viewtopic.php%3Ff%3D38%26t%3D2717267