Works great

doesn't do anything, I still see only Youtube comments

I was using a similar addon that started to trigger Reddit's rate limiting and wasn't being maintained. Karamel doesn't have the same issue and I haven't ran into rate limiting since I switched.

This seems to be better-implemented than the two most popular extensions of this type, and is fully compatible with my other extensions.

Glad to see this on Firefox! Wonderful add-on!