Wasn't actually working for me, I put in an address and it would just flash back to the "http://." The "i" wouldn't load for me either.
Also, I don't know about other people, but I have a lot of little things on my dash already, and that would take up like half of it. Maybe if you could make it small to start with, like the dictionary or wikipedia widgets, and then get bigger when you put in an address it would be better.
I also don't really see the point of it, it's not really saving any time, I mean it's either get the dash up and put in the website, or click my firefox app in the dock to do the exact same thing. Sorry if I'm being harsh, but you asked for opinions