Works for a day then it hits you with a free trial ended you didn't even know existed till you check the extension to see why it stopped working almost everywhere.

1) It didn't work for me, and 2) It's not free.

"2 years ago" becomes exact date which often is crucial.

This is one of those extensions you don't realize you need until you try it. It makes browsing YouTube so much easier and hassle-free. Kudos to the dev for porting it to Firefox!