If you use more than one browser, then you would have probably found out by now that the Dodge app is much faster on Google Chrome or Safari than Firefox. Yes, that is the unintentional cheat code. The game is just simply easier to score on Firefox!

The reason for this is the difference in the processing speed of the Javascript engines used by these different browsers. A difference in performance across browsers, which was never a problem with Flash as all apps ran from the same Flash runtime environment, does seem like a setback for HTML5-driven games as of now but it is believed that it will become negligible going forward. For instance, Dodge seems to be faster on the latest beta of Firefox 4 already!

Take a look at what other developers are saying about this issue on Stackoverflow.