It works, it's not technically bad, but it's just too simple to be practically useful.

For any but the simplest conceivable use case, an extension like this needs to track speed separately per open video/per tab, and should revert to a base value on opening a new tab. This one doesn't seem able to do either.

It also causes an issue when viewing YT Shorts, as it uses the last set speed, but neither this extension nor YT itself provide a speed control. It needs to either disable itself or provide a speed control, in this case.

Does the job well! Just a suggestion for the dev to update the app for the new UI change on youtube which has misaligned the speedup icon in the player.

Controlling using scroll and LMB to reset are genius, does what it says, simply good

can't change default speed shift step

It’s good, I use it all the time, so much quicker to change speed than default way.

But when an ad comes up it resets speed to 100% again. If I change the speed with the normal YT changer it will not reset. Is there any way to fix that please?..

I'm using these 2 add-ons to deal with YT ads:

YouTube Ad Auto-skipper
Mute Youtube ads

- and I thought it was maybe one of those doing it but I turned them off and it still did it.

So there must be something different about the way this add-on changes the speed compared to the default YT way that is causing the issue.

Simple and effective

Very simple but very handy.
To control speed hover over icon(left near Autoplay icon) and scroll the mouse middle button. To reset to normal speed just click left mouse button on icon. Fantastic! ))