Or is it just because you only do testing using Mozilla, and don want to deal with browser compatability issues?
The main point why it’s Mozilla only at the moment is because of the cross-plattform availability of Mozilla. One of our main sponsors uses a lot of Apple computers and on a Mac you don’t have any other choice than Mozilla for doing something like that. MSIE/Mac 5.2 is very feature-limited compared to MSIE/Win 6 and Mozilla. Another reason is indeed the amount of work needed to get it running on different browsers. Our resources are very limited right now. But as this is now an open source project now, we hope to get some support from other people and we welcome any contribution.