The real browser war isn't between Microsoft and anyone. It's between Firefox and Google Chrome , jostling to become the aftermarket browser of choice. Yesterday, a Google engineer assured News.com that the company's new open-source browser processes webpages much faster than Mozilla Firefox — "Many times faster. I guarantee you." Mozilla engineers released their own test results that show Firefox with a slight performance edge. But the latest test, run independently by News.com, skews the other way.News.com reporter Stephen Shankland ran tests suggested by the Chrome team. Google's browser trounced the rest of the field: Faster browsers will, in theory, be good for online commerce. Years of tests and server logs have proven that faster page performance leads users to hit more webpages, whether they realize they're doing it or not. Now if only we had more money to spend online.