I wanted to install Firefox in ReactOS and it seemed to be fine. I downloaded the version 48 from the ReactOS Package Manager and at the first start it said: "Update to Firefox 58 is available" and I clicked that totify. Then I pushed the button "Restart Firefox now" and a few seconds later Firefox 58 opened and everything workend fine... At least I thought it was like that: I wanted to log in to my Mozilla account and it opened the log-in page. It didn't load the page correctly but stayed forever on the white screen with the moz://a logo in the bottom left corner of the window and the blue loading circle in the middle. Than I let it sit there and came back about one hour later but nothing had changed. Then I tried to install a newer version manually but when I clicked on the installer *.EXEs ReactOS said "Not a valid Win32 application" or the Firefox installer said "Not compatible with this version of Windows". I really want to use the newest Firefox version on ReactOS (a legal Windows-imitating OS at the technical state of Windows Server 2003) but I couldn't find a way to do so.

Can anyone help me to install Firefox 89 or higher on ReactOS?