Your description of Netscape being "backstabbed" appears to conveniently forget that Netscape didn't ship anything useful for for FIVE YEARS. As stated by Wikipedia (http://en.wikipedia.org/wiki/Netscape#Netscape_Communicator_.28versions_4.0.E2.80.934.8.29):
Netscape released the final version of Netscape Communicator [4.x] in June 1997.
Netscape 6 was not yet ready for release and it flopped badly
Netscape 7.0 (based on Mozilla 1.0.1) was released in August 2002