For some reason that I still can't figure out, my normal browser tooltips are defective on (only) youtube and they pop in and out before I have time to read them. The addon I have previously used to get around this problem is now no longer available and I had tried installing this one, only to discover that sadly it didn't work where I needed it to, that is, on youtube itself. Weeks later, I decided to search for my previous addon hoping it maybe had been re-uploaded, but no, it isn't available... so out of sheer desperation I revisited this addon, hoping against hope that maybe miraculously it had been changed and would now work on youtube and lo and behold, it now does!! It actually does!! :D I did have to set the addon to show notifications rather than tooltips, but I don't care!! I now have access to the information I need and that's all I ever wanted so I am SO very grateful. I cannot thank the developer enough for this miracle. Thank you so, so much! Sending you a virtual hug out of sheer happiness and gratitude. Thank you!! >>>>>HUG<<<<<