This has been a great little add on for firefox... I have been using it for years: mainly on a Linux platform Ubuntu 16. through 22.04 with few hiccups. I first discovered it when I was using a Toughbook that was running XP. I have been asked several times to donate or write a review, and am usually in the poverty stricken rat mode, as I am now having just been discharged from the hospital after a heart attack,, HOWEVER: In spite of probably having to register for the "Quiet Skies" watchlist just to write a review, this program on Ubuntu is worth it... I have used it on a number of platforms to capture everything from youtube videos to news to things of purient interest worldwide...
I have found it easy to use and install; and will continue to use it. the only downside I have encountered has NOTHING at all to do with the add on but the way Firefox has to engage with the satanic windows 10 which I have been recently been driven to with the untimely death of a SATAn drive in my last Ubuntu build,,, I am currently saving up Fungible/recyclable materials to buy current leenix friendly hardware and after that build will gladly buy a licensed copy of this fine little program...