We've known for a while that Mozilla was working on a mobile version of Firefox. In fact, you can already download early builds of the web browser, codenamed Fennec, but at the moment it will only run on the Nokia N810 Internet Tablet.

But Mozilla says a Windows Mobile version of Fennec is on its way and that an Alpha release could come within the next few weeks. And now a few screenshots have surfaced which would seem to indicate that at least someone is already running Fennec on a Windows Mobile phone.

If the screenshot on the left looks rather crowded for a mobile browser, it's important to keep in mind that Fennec works in full screen mode most of the time. The location bar, tab menu, and even forward, back, and reload buttons are all designed to disappear when you're not using them. But Fennec does seem to take an interesting approach to tabbed browsing by presenting thumbnails of open pages, which seems both useful and like a potential waste of processing power on mobile devices.

One of the screenshots visible at the::unwired shows Fennec's score on the Acid3 test. The results? An 88. Not perfect, but not bad for a brwoser designed to run on a cellphone or PDA.