It may not be SUPER accurate but gives a good "mini preview" to what you might expect from the video.

I don't see the number of dislikes below videos. It worked for some time, but not anymore :(

Gooooooooooooood

Have been using this add-on for a half of year or even more and it is still one of my favourite add-ons out there.
Update: Thanks for update. Glad that mozilla finally approved it. Didn't think that I would miss ability to see dislike count this much.

Finnaly i can see the tremendous amount of dislikes on Disney videos again

...

An addon that actually does it job, I'm amazed.
Only problem is that the like-dislike ratio progress bar doesn't work, aside from that, good addon.