I got my Dell XPS 13 (9343) for a while and decide to install Ubuntu 15.10 as duel boot.
By following the guide its pretty easy to get a Ubuntu environment. To setup my daily develop environment, I take the foxbox setup script for 14.04 and everything works fine.
So for windows user who want develop FirefoxOS gaia with real device, I recommend you try foxbox first. If you have more commitment, install the Ubuntu. With duel boot you can keep windows and have a more developer friendly environment to develop connecting devices.