I have javascript enabled but I use a firefox plugin called ghostery and didn't realize that I needed to disable it.
Funny... I have ghostery, noscript (with some whitelisting) and a bunch of other plugins but it worked just fine for me. Something else than ghostery, perhaps?
I only had to turn ghostery off for it to start working.
Ah, that was it for me too. Thanks!
I've got JS enabled and it doesn't work for me. Neither search itself, nor special effects. (FF 23.0)
Make sure none of your extensions are blocking the Google AJAX Search API