If you cant get it to work with firefox 8 neither can I)
tro to use Internet Exploder.
it works great for me.
the only diffrencies is that I cannot use the firefox extension to move softbuttons up and down in the list.
But a combination of the two browsers/web interfaces. is a good solution for me.
It takes more clicks and time, but ,hey, I dont reprogram my remote 11times a day!.

I have read a lot about this "favourite" thingie.
WHAT is it? is it a button on the harmony models that TC30 dont have? what does it do? is it like a shortcut to a list over favovirte channels? Is it pssible to use it for someting else?, or is it dedicaed to be used with a "watch TV"-activity?