I'm not sure why, but this works much better in chrome for higher speeds (like 10x). In firefox the video simply can't keep up and if you pouse or use the progress bar the video won't play anymore.

Edit: Hey! Thank you for the reply! : ) I'm more than eager for this to work as I'm jumping from chrome to firefox. What have I noticed: in chrome, even at 1080p the speed goes over 10x no problem. But here in firefox the buffering can't keep up (?). If i reduce video quality to 320 sometimes it works sometimes not. After the progress bar trumps the buffering, playback stays choppy and it becomes hard to seek or even play the video.
**Disabled hardware acceleration and it seems to be working just like in chrome (where hw accel is on). RTX 4070. Why?

Great though I wish there was an option to add a specific key before the other controls, so for example adding Ctrl before Scrollwheel Up/Down

Excellent implementation of mouse scroll for speed.

- Request new feature: automatic playback dynamic acceleration

Example :

1- set desired speed *e.g. x3

2- select starting speed *e.g. x1.5

3- % of video passed until desired speed is reach e.g. *60%

Result:

The video begins at x1.5

increases gradually as a function of time based on the duration of the video

by 60%, speed had gradually increased from 1.5x to 3x in 0.01 stepsizes.

e.g. at 60% of elapsed video duration it will be

playbackRate = x1.5 + (x3 - x1.5) * (currentTime / duration) / 0.6

This formula means that the playback rate will start at x1.5 and increase linearly as a function of the current time divided by the duration of the video until it reaches 60% of the duration, where it will reach x3.

This passive increase in cognitive load will lead to increased comprehension.

Does the job for me so no complain. But one suggestion If it's possible, Can we add our own custom key?

Dev responded to my kneejerk review within hours, before I updated after searching every alternative... I feel a bit bad! Went to 3 star as I decided the features were fine, 4 star as every alternative is worse. So by default this is the best, and I can use autohotkey and stuff to fill in any gaps. The only loss is against the minimalist mouse speed options in (broken/hiatus) Enhancer for Youtube.

My initial issues aren't dealbreakers after adjusting settings and seeing worse alternatives: The speed can be set to vanish cleanly, I overreacted. Backspace is a decent hotkey to reset time if next to numpad. Scrolling for speed as a remote control *is* what I was hunting for above all else, and your default works for projecting but interferes with browsing. It is a painfully near miss, but an out of the box solution is a luxury. I can add hotkeys to peripherals with less time than I spent looking for alternatives.

The enhancer icon appears on lots of pages off video sites, but that icon spam may be an unavoidable annoyance and I don't see any privacy issues. After hours between checking alternatives and adapting, I was too spoiled, and if mouse scroll is idiot-proofed for people scrolling through comments it's a 5. I love the granularity so much, and I want to test it with music sometime.

--- Initial ---
Early Version? Stuck over the video (as in screenshots) and few allowed hotkeys. With just a forward-slash it would be good enough for my needs. It's not useful with mouse, as scrolling up and down a page will put your cursor over the video and it's easy to unintentionally alter speed. The addon is granular, functional, and the theme options are nice.