Its a good blocker for sure, but i have a strange problem and its related to this addon. When its enabled i cannot delete/backspace my comment or words when i made a mistake (only Youtube). Even when i disable the addon for Youtube i cannot delete. Only when i disable the whole addon then my backspace works again. But maybe theres a conflict with other addons because i have a shitload of addons installed for firefox. So, yeah.. just wanted the devs to know.