Looking for logging into the Firefox Proxy Auto 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 Proxy Auto site. After that you can login as usual with your login credentials.
https://bluecon.org/blog/2016/08/mozilla-firefox-proxy-autologin-settings.html
https://support.mozilla.org/questions/943488
https://support.mozilla.org/de/questions/1089662
https://addons.mozilla.org/de/firefox/addon/autoauth/
https://support.mozilla.org/questions/1019419
https://bugzilla.mozilla.org/show_bug.cgi?id=646452
https://bugzilla.mozilla.org/show_bug.cgi?id=521467
https://superuser.com/questions/379160/how-can-i-make-firefox-remember-my-proxys-username-and-password
https://kb.globalscape.com/KnowledgebaseArticle10522.aspx
http://resources.edgewave.com/docs/guide/iprism/help_6-4/iPrism/Networking/Sessions-Clients/Browsers/IP0167.htm
https://stackoverflow.com/questions/41169/how-do-i-write-firefox-add-on-that-automatically-enters-proxy-passwords
https://support.symantec.com/en_US/article.TECH244744.html
http://forums.mozillazine.org/viewtopic.php?f=38&t=571474&p=6367375