iirc Firefox will use installed AV software to scan downloads.
ReactOS components have been flagged by a few AV softwares for a good number of years. I found
this old thread.
I would suspect that the AV software that flags it is probably seeing Windows DLL and EXE files and freaks out because it's not signed by Microsoft, as that is something that could occur on a Windows system that is infected.
I used to have a VM with ReactOS, but deleted it a while back.
Just installed it again now and it still won't accept the Windows 9x or XP VMWare Tools (Drivers). "Explorer" hangs altogether by simply viewing the directory containing the file. It also hangs trying to run the installer from command prompt.
Well, The install itself went smoothly, I suppose. I was able to install the Update Lister bootstrapper for our business software but lost interest. I'm not sure if the needed .NET version will install but that's something for later.
What do you mean regarding "Crippled OpenGL Performance"? Is that a reference to Linux distributions typically coming with a software-based MESA OpenGL driver and thus getting lower performance than Windows Out-of-the-box?