I have become increasingly disenchanted with this add-on, not because of its performance in regards to YouTube, but because it's exceedingly obnoxious that each time it updates (which is often), it pops open a new tab to report the new changes AND THEN OPENS to that tab. This is very disruptive each time, particularly since it doesn't happen when you open the browser, but instead when you've had the browser open for a while and are engaged with something else. If it merely opens a new tab, fine, that's still a little irritating, but the fact that it forces you to look at it has frustrated me to the extent that I'm uninstalling it.