> how are you even going to download a third party browser, if the OS doesn't come with a client you can use to download it with?
Software was distributed offline as well. It seems like a long time ago now, but there was no shortage of AOL installation discs at the time.
(In fact, I believe both Internet Explorer and Netscape Navigator were distributed on floppy disks at one point, although that would have been long before the antitrust case.)