Which restaurant in Downtown Disney has the best view of the fireworks?

The only places I can think of (other than the big plaza between the Disneyland and CA entrances) are from the top of the parking garage, and maybe from the House of Blues though that wouldn't be nearly as good as the garage.

You might try posting this question or searching for possible locations to watch the fireworks on one of the forums dedicated to all things Disney,
Such as www.disboards.com
Just make sure you are finding info for Disneyland, not Disneyworld!
I too think the top of the parking structure would be the best viewing if you are not in one of the parks.

We were on the tram heading back to the parking lot one visit when we saw the best fireworks. Finished them standing at the edge of whatever floor we were parked on in the garage.

I could see the fireworks fairly well when I was right outside the gates. Alas, not the rest of the show.

Otherwise, I would not do a restaurant- if at all possible, maneuver yourself into the middle of Main Street.