If you recall a couple weeks back we mentioned that Mozilla was switching the Firefox for Android application to use native Android UI elements instead of XUL. This was done to create a unified look and feel and improve performance, and now anyone can give it a run. The fellows at Mozilla have now started pushing nightlies that include the changes. The newer builds are faster, but of course like any nightly builds there will be bugs. If you want to have a look, or if you're feeling like bug-hunting and helping out the Firefox team, grab the nightly here and install it. You'll see that Firefox has come a long way, and they are slowly building a mobile browser that can rival a true desktop version.
Source: Mark Finkle