Rated 5 out of 5 stars
I'm using the beta version with Firefox Aurora 5.0a2, and it works like in the 4.0.1 firefox version.
As of others said, when you click on an unloaded tab, it doesn't load itself. But I like this "bug", so why don't you keep this function (with an extra option) in the next stable version?
Thanks for the time you spent developing this addon!