It's called starryskin (I know it's a bit crappy name, but I had to come up with it quite quickly). It's a theme for firefox 2 (the current published version). This skin was made with Mandriva in mind as the colours are mostly Mandriva blue and orange.
The theme is in the sandbox of addons.mozilla.org until it gets accepted by Mozilla folks. But you can get if from my deviantart page as well: http://dude67.deviantart.com/art/starryskin-0-9-0-86789389
Comments here as well as in the sandbox of addons.mozilla.org would be greatly appreciated. To download and review it in the addons.mozilla.org requires the user to log in first. But if any of you are registered there, I'd appreciate your reviews as this would help Mozilla to approve it as public theme for FF2.