The Rise and Fall of Netscape Browsers (1998)
www-inst.eecs.berkeley.edu
www-inst.eecs.berkeley.edu
It was not the main reason for it's failure but the rewrite sucked resources that could have been used to compete.
In contrast Microsoft bought a browser and continue to improve it.
Ultimately the problem for Netscape was that it could not find a way to make a profit but the rewrite did not help.