Netscape Navigator 2 was a proprietary web browser released by Netscape Communications Corporation as its flagship product. Versions were available for Microsoft Windows, Apple Macintosh, Linux, IRIX, HP-UX, AIX, Solaris, SunOS, and FreeBSD. The browser introduced and improved a number of features and also added proprietary extensions to the HTML standard. Notably, Netscape 2 was the first browser to support JavaScript and animated gifs, two technologies still predominant on the web today.