I have no idea what mistake YouTube made, but now Enhancer not only allows the invaluable volume boost and refined video speed control to solve the issue of YT videos having no volume normalization or YT’ers taking way to long to speak to the audience, but the ad block feature works again!
I have no idea what happened, but this is the best add-on for Firefox right now and I cant be happier. Great job devs. You deserve endless praise.