A fantastic Firefox add-on that works flawlessly. Every time YouTube change their layout, this add-in stops working temporarily but Dishita is on the case instantly and within a few days, has released a new version that updates automatically and works great again.
I don't have enough words to thank Dishita for this magnificent add-in and for the hard work that the author puts in to keep it up to date. Full credit to a very hard working coder for this fantastic software. Thank you very much.