After successfully installing in my windows system, last version FF fully not working, including not opening main window. If window opened (after a lot of restart and delay) and I type URL, FF do nothing, not create request and not read information from typed URL. But any another browser working fine. I try changing proxy definition, try to reinstall FF a lot of times - but FF do nothing, no main window. Usually I working with ProtonVPN, but problem not only with proxy detection, FF not open even local files. If you see carefully in the screen below, you may see that FF thread is finish, FF window not open in Windows panel. I have collected all information about this problem including ProcMon.log, ip configuration, if it needed I may send to support any my software configuration (including access from Anydesc), because I'm professional programmer and I'm sad that this fine browser has fatal bugs. And as programmer, I'm don't understand logic of your browser - what problem you have to open main browser window and show in this window message like "sorry, our program was crash with code XXXXXX"? Or "we not detect gateway of your system" or what critical error we have to fully discard to open main browser window?