This add on has been great on Firefox. It is almost a must get add on whenever you use Firefox, especially for me who love using Firefox to watch YouTube. It includes all kinds of features and most importantly the ad blocking feature. It is like the little brother of AdBlock so people might just overlook this add on. It has had not been affected when YouTube just started the anti-adblocker policy, and with just the tightened policy recently, they finally tried to get rid of all kinds of ad blocking add ons, including this add on. So I really hpoe they could get a work around for that so that I can really enjoy watching YouTube on FireFox again.