I wrote this description somewhere early in 2000 and hardly updated it since that time.
Netscape 3 was once again an innovative release. It ruled the browser market in 1996-97.
With the release of Netscape 3, web programmers were again given more possibilities for true interaction. It quickly became the standard browser as a worthy successor to Netscape 2.
The most popular innovation was the document.images array, through which you can change images on the page and create the famous mouseover effect. Also, the new window.focus method was a very nice extra.
Netscape 3 on Mac and Linux show the same qualities as their Windows counterpart.