Netscape Communications Corporation (originally Mosaic Communications Corporation) was an independent American computer services company with headquarters in Mountain View, California and then Dulles, Virginia. Its Netscape web browser was once dominant but lost to Internet Explorer and other competitors in the so-called first browser war, with its market share falling from more than 90 percent in the mid-1990s to less than 1 percent in 2006. Netscape created the JavaScript programming language, the most widely used language for client-side scripting of web pages. The company also developed SSL which was used for securing online communications before its successor TLS took over.