Looking for logging into the Phpbb3 Firefox Problem 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 Phpbb3 Firefox Problem site. After that you can login as usual with your login credentials.
https://www.phpbb.com/community/viewtopic.php?t=2173639
https://www.phpbb.de/community/viewtopic.php?t=239740
https://www.phpbb9.de/phpbb-administration-und-benutzung/kann-mich-mit-firefox-nicht-mehr-einlogen-t38363.html?style=3
https://www.phpbb9.de/phpbb-tipps-anleitungen/login-probleme-faq-t20304.html
http://forums.mozillazine.org/viewtopic.php?f=38&t=516066
https://www.reddit.com/r/firefox/comments/2zso25/very_weird_thing_with_a_phpbb_forum_on_firefox/
http://www.phpbb3bbcodes.com/viewtopic.php?t=689
https://www.baywotch.de/phpbb/viewtopic.php?f=5&t=2877
https://support.mozilla.org/questions/1185560
https://stackoverflow.com/questions/16788764/phpbb-login-script
https://stackoverflow.com/questions/25311672/how-to-login-directly-to-the-phpbb-administration-control-panel-phpbb-3-0-12-w
https://www.python-forum.de/viewtopic.php?t=24236
https://www.untis.at/phpBB3/viewtopic.php?t=5647