You don't say what OS you're running. Be aware that many web secure transactions now require at least a Firefox version 52 ESR or newer. If you are using LL3.4 updated then you are okay that way. Try firenice03's suggestion. You may have to allow a data port entry in your firewall also. The warning you are getting sounds like your browser is not new enough, or you have disabled redirect in your browser. Just going off your user name maybe you're from Wisconsin. I'm close to Lake Geneva. I might be able to help in person. Let me know.
TC
TC
All opinions expressed and all advice given by Trinidad Cruz on this forum are his responsibility alone and do not necessarily reflect the views or methods of the developers of Linux Lite. He is a citizen of the United States where it is acceptable to occasionally be uninformed and inept as long as you pay your taxes.