Microsoft was buying Netscape just to screw it and shut it down. M$ evidently decided it was more profitable overall to just kill Netscape the way it did, with all monopolist crimes M$ was convicted of in 1999 - by which time Netscape was dead, because it worked.
A lot of people seem to forget that Netscape's CEO publicly stated that their goal was to create a platform/api that applications could run on, and make the underlying OS completely irrelevant. In the Bible/Torah, David defeated Goliath. But 99.9% of the time, when the little punk challenges the big kid on the block, the punk gets creamed.
That doesn't make MS's behaviour right. But in any rational human being, it burns off your sympathy for Netscape.