- Internet Explorer is a web browser developed by Microsoft since 1995 that is fully compatible with XSLT 1.0 and stores temporary internet files to allow faster loading of previously visited pages. Its last version improved the user interface, customization, and management of tabs along with new privacy content filtering tools. - Firefox is an open source web browser descended from Mozilla that has approximately 30% worldwide usage share. It includes tabbed browsing, spell check, bookmarks, a download manager, and private browsing. Firefox uses a security sandbox and SSL/TLS encryption. - Safari is a graphical web browser developed by Apple that includes tabbed browsing, spell check, bookmark viewing, and integrated search. It provides a pleasing development environment