A new web browser has been released that promises total privacy for its users. Browzar, as it is known, automatically deletes all traces of the pages a person has visited,  and the terms that they have searched for on the web. Most browsers, including Microsoft's Internet Explorer and Apple's Safari, allow users to do this manually. The developers of Browzar say that it will be useful for people who want to protect their privacy on work PCs or when using shared PCs in Internet cafes.