Silverlight, Wpf Web App (xbap) or Click Once? Pros and Cons

Question

We are starting a new project and I\'m trying to decide which of the Wpf-esque develop/deploy strategies we should go with. In our case we are looking at quite a complex bus

Answer 1

Isn't click once available on firefox these days, via this addon: https://addons.mozilla.org/en-US/firefox/addon/1608