Microsoft has underlined support for its Internet Explorer 6 web browser, despite acknowledging its flaws. The software giant said it would support IE6 until 2014 - four years beyond the original deadline. Critics - some of which have started an online campaign - want the eight-year-old browser mothballed because they claim it slows the online experience. "Friends do not let friends use IE6," said Amy Barzdukas, Microsoft's general manager for Internet Explorer.