McDonald's said it has begun trying out a technology, called Ooqa-Ooqa, that works only with Internet Explorer browsers, altering it when visitors go to certain websites, AdWeek reports. Starting last week, visitors to BET.com, an affiliate of Black Entertainment Television, had their web browsers altered to a McDonald's-branded browser that markets the new fruit and walnut salad introduced in May. A McDonald's ad and a link to an interactive game of catching fruit in a bowl appear within the browser, which returns to normal after exiting the site. Audi, Nintendo, Nokia, NYPost.com, BostonHerald.com and Forbes.com have tried out the browser advertising technology, made by United Virtualities of Buenos Aires, Argentina.