ViewAbout 2.0 broken on Firefox 4 Betas

ViewAbout 2.0 seems to be broken on Firefox 4 Beta 1. The about: windows now only show up as grey panes.

I suspect they might be due to the following changes, but I don’t know for sure and might not have much time with the impending school semester ahead of me.

Patches are welcome at Google Code though. :)