I have a game currently in the early 1980's and there are a bunch of companies oriented around websites and browsers that can't make any products (and thus, can't make money). I also have the option of developing a Browser, but I can't pick any Operating Systems to make an actual consumer market for it (Eg. I can make 100% interest with features but still have 0 consumer reach; the analysis shows there is clearly no active market with saturation). My suspicion is that this is supposed to be tied (at the earliest) to the Networking tech, which isn't available until 1985, but you probably know more.

Browsers never seem to have any OS available for them

It takes a little bit for AI to add networking to their operating systems after it has been unlocked, it usually appears in the OS in the early to mid 90s.

I'll make an update soon so browsers don't get unlocked at the start of the game.