Gran Paradiso
I just downloaded Paradiso (still wished they just called it FF 3.0) but anyways must of the themes I had didn't work, only two out of my 32 extensions work, and the little blue world icon is ugly.
So I guess this could be a thread explaining its flaws.
If you have it, reply here.
(Also to all people who hate ads don't get Gran Paradiso because they do not support ad block)