Until recently I thought this was the only one that worked in Prime Video.
It is not.
And compared to Video Speed Controller, this one doesn't manage to make Prime Video remember your preferred speed for the next video, so if you're like me and you like to binge a series in one go, you need to set the speed again at every episode.
Not ideal.
But I thank the Dev for their effort, it was much appreciated until now.
If they manage to make the speed change permanent, I will use their addon again because it's visually easier. I like visual controls.