Masquerade as an anonymous user in Drupal using the Stealthier Firefox plugin

There's a nice little firefox plugin called Stealthier, which allows for secretive browsing of the internet. While it's probably most widely used for untraceable porn siestas, it can also allow you to quickly switch off your cookies, cache and sessions, making you instantly anonymous on any site. In particular, I use it to view my Drupal sites from an anonymous perspective without logging out or opening another browser (that likely doesn't have Firebug). Then, I can just turn off Stealthier and I'm back. Kind of like the spy in Team Fortress 2.