Would be much better if it could also manipulate video speed, volume and brightness

Amazing extension. You can fast forward a video by double tapping the right of the screen. This extension adds the most important QoL feature missing from Firefox Android compared to Samsung Internet.

good extension! works very well, suggestion: could you add an option where clicking/tapping once in a videoplayer pauses it universally?

I tried it on my phone. It worked exactly as expected!