Sadly this stopped working like a week ago and keeps freezing my video / tab / Firefox when using it. I noticed it when the remaining time feature didn't work anymore then I tried turning it off / on. Kept freezing on me since then.
the feature just received an update. (please differ outdated feature vs actual freezing/ or cpu load) . You shouldn't be surprised when one in 200 features ever needs an update, but be surprised how our development team of 0 people keeps up with Youtube's changed like Sisyphus most of the time. (There might be guarantees for fast updated in future, if we get any funding.)
