This was a decent add-on that I forgot about and let run wild, but unfortunately the lack of a whitelist means I cannot get much use out of this anymore. For some reason it recently broke Pocket's inline articles, and I found out from the reviews that it breaks certain features in Gmail as well (which I didn't connect to this add-on until now!). Please add a whitelist, or at least more user flexibility in terms of maneuvering through features that may break important website features.