As my FF extensions were updated this morning I was reminded on how increasingly applications are being accessed by us on the WWW. Given that more and more apps are exposed to web services and being accessed by legacy apps the browser is becoming even more of a services portal.
Today's browsers are customizable with extensions that do everything from removing ads to filling in forms. And this is just the beginning. We're only a few years into the Web 2.0 phase after the dot com bubble burst and it seems there is no slowing down. The phenomenon of social networking will push the envelope even further in the near future.
Just more proof that tomorrow's OS is today's browser.