"Netscape Search Engine"

Netscape quickly became a success, and the overwhelming market share it soon had was due to many factors, not the least of which was its break-neck pace of software releases (a new term was soon coined - "internet time" - which described the incredible pace at which browsers and the web were moving.) It also created and innovated at an incredible pace. New HTML capabilities in the form of "extensions" to the language were introduced. Since these capabilities were often flashier than what other run-of-the-mill browsers could produce, Netscape's browser helped cement their own dominance. By the summer of 1995, it was a good bet that if you were browsing the Internet, you were doing so with a Netscape browser - by some accounts Netscape had as much as an 80%+ market share.
With the launch of Windows 95 and a web browser of its own (Internet Explorer) in August 1995, Microsoft began an effort to challenge Netscape. For quite a while, Internet Explorer played catch-up to Netscape's continual pushing of the browsing technological envelope, but with one major advantage.


Reaction:
It doesn't look like Netscape will be much of a marketshare threat to anyone anymore. As already mentioned, the real work goes on with the Mozilla project now, but it is uncertain how this open source project will fare and progress now that its corporate parent has loosened its ties.
I already do - from what I can tell there are no significant differences of any kind between the Mozilla code and the corresponding Netscape code with respect to HTML/CSS support.