I love what this extention does
Im giving it 4 out of 5 stars
I have Tryed it on:
LibreFox - works but there is about 4 or 5 cm worth of empty space from the right-hand side of my 32" screen to the edge of the scrollable youtube video suggestions panel

Firefox Nightly 143.0a1 (2025-08-07) (64-bit) - does not work

It would be good to have the option to decide the background color of the scrollable video suggestions area - dark sometimes makes the text hard to read underneath the comments section
Black text on top of a dark gray backgound = hard to read