I also tried it with MP2.3.X and can confirm, the issue is the same. So it's not related to MP2, but browser updates (but I don't think so) or the target link of the login page. Because the source souce is not open, I can not even see the target URL and can not try to add it manually to my firefox.The second client is fresh installed i first tried it with MP 2.3.2 same behaviour
Too bad . You guys do everything in your free time, but you are a team and it’s not gentle to leave the team without a note. As an user I can not complain too much about a free product.I think the plugin is dead, sorry for that. All questions remained unanswered and he didn't login sind almost half year now.
Hopefully somebody can offer an alternative by time.