LISTEN HERE GUYS: while this add-on does not work anymore (for now), consider visiting the official website and installing either the latest version OR using the userscript!

Till it is back working users can try addon Thumbnail Rating Bar for YouTube
it shows you likes and dislikes before even clicking on a video.

Everyone, the add-on is not working right now, but the fixed version is created - it just needs to pass Mozilla's review to be authorized. Give it some time.

Was great when working but youtube has done something to stop it working, sad face.
Now working again, smile face. Now not working, again

extension no longer works unfortunately

Don't working....

Worked for a while, but as of yesterday has stopped working. I assume it just hasn't been updated but I cant rate it more than 3 without it working

great for helping to inform me, but can sometimes slip with youtube updates

Great addon, works every time. Currently waiting for the new update to be uproved by Firefox, so that the extention is functional again.

No longer works even updated on October.

A great extension. People, please wait for the addon to be updated, it's mozilla you're waiting on as this is a "Recommended" addon and has to be approved by them. There's already and update that you can grab from the github and it works perfectly. The dev has already published the update, they've done all they can on their end.

Doesn't work anymore

1 star until it doesn't work.

Please stop downvoting because it stopped working. You can read. Youtube broke it-
Please wait till the author makes an update (if possible).

stopped working. YT must have changed its approach.

It's been working great until few days ago thanks to yt/goog. Hope the author would update this handy extension soon.