Everything is well, except that, unfortunately, it conflicts with YouTube's built-in "Playback speed" function, as well as with other add-ons, e.g., https:// addons.mozilla. org/en-US/firefox/addon/youtube中文配音/, which causes freezes and makes rewinding impossible.

Starting today, for some reason, when I click on a video from a YouTube notification, it no longer works. However, if I go to the same video, but not through the YouTube notification, but within the channel, then it works fine. Or if I just click the channel real quick and then go right back.

Please add "return to 1x" button. maybe put it on shft+/ ?

Keeps disappearing (I'm on latest version 1.10). It's good when it works. Could do with being able to scroll mouse wheel to change speed.

Great design and UI.
However, I'm not sure why, but the extension simply stops working from time to time.
Sometimes it works no problem for a few days.
Sometimes I open a new video and the extension is gone, so I have to deactivate and activate it again... but it's gone by the next video.
Also, deactivating and activating it causes the UI to appear multiple times on videos where the extension was still active (only one works)

YT is flagging this add-on as an Ad Blocker

So I finally found a speed extension that works superbly with customisable speeds and a great keyboard shortcut. Well done on this extention.

Custom default play speed and even custom speed increments, works with the existing youtube keyboard shortcuts.

edit, 22 Oct:
Design update needed since YT recently overhauled their player UI (buttons are now misaligned—but still functional!)
edit, 23 Oct:
All fixed now! Thanks nizioleque! Still the handiest YT addon around!

Works pretty dang seamlessly! Love the ability to add your own custom values, but keyboard shortcuts (rather than single-increment arrows + a clumsy drop-down list, which gets cut off at the top if you have lots of individual speed values) would make this even more intuitive. What's really missing is pitch control—all the other add-ons that manipulate pitch have clunky UI or fussy functionality. Regardless, this here's the best speed control add-on I've yet to come across.

I appreciate this extension, but please add the ability to create keyboard shortcuts for adjusting speed! I would really like the ability to use "+" and "-" to adjust instead of being stuck using the default controls.

EDIT 8/11/2025: Speed control on the video player is no longer aligned with the new YouTube player design.

elegant and useful! special respect for the ability to create custom speeds!!!

some talk too slow in their videos, this quickly helps

Simple, elegant, and does the job.
A few improvements I can think of:
Let us use the mouse wheel on the icon of the addon to increase/decrease speed.
Let us customize the keyboard shortcuts, or disable them completely.
These aren't must-haves, but would be nice.
Still, 5-star, and thank you.

Works seamlessly on my M1 Air. Very minimal. Non intrusive. Customizable. The developer is very responsive. Let's get this guy a beer