It is very important to note that this is not Mobile Firefox. Its pretty stable for ‘normal’ use but I was able to crash it by opening a bunch of google maps tabs. (failed alloc not handled properly). Also, text input is broken; I’m sure it won’t be a problem with the hardware keyboard on the N810, but right now focusing on the address bar or a text box doesn’t bring up the soft keyboard.

[Seth's note - but bringing up fingerkeyboard on n800 does work ok ]

What this is, in my opinion, is a very nice starting point. This binary has all the capabilities of desktop Firefox, including support for XUL and SVG, so it can be an excellent platform to experiment with different UI concepts for mobile (both the browser UI and web pages targeting mobile users). We are also working on tools to develop and test mobile UI’s on your desktop, but more on that later.

We have a lot of work to do on stability, usability, performance and getting the “right” mix of features.