(AdBlocker for YouTube™ Video) by Emmy does eliminate advertising while watching you tube videos. However, this extension is horrible since it also completely blocks the main comment bar when attempting to reply and leave a general comment on ANY you tube video. I wasted 3 hrs trying to trouble shoot this for FireFox Quantum Browser V. 61.Beta 10 (64 bit). Be warned! This extension will not allow you to comment on any you tube video with FIREFOX browser!