I interviewed at Netscape shortly after they announced they would release the browser as open source (June '98, ended up going to Inktomi). I remember being very excited about this, and downloading the source when it first became available. I found out that my (decent) desktop machine was not powerful enough to compile it. When I found a machine that could compile it, it took about 8 hours.
No surprise that it remained a Netscape project for so long.
No surprise that it remained a Netscape project for so long.