This extension is used to set a custom playback speed for YouTube videos outside of the default options given by YouTube. It has finer granularity and some other nice features. It is available for Firefox and Chrome. If you want to know more, please visit the respective extension (or add-on) pages from
The Chrome Web Store
or The App Store for Safari.
Note that Apple, requires the Safari extension to come as part of an App Store App, the code for the App itself is the glue code generated by an Apple provided utility to convert a Web Extensions extension into an App Extension. The code for the App portion can be found here. The actual extension code is based on the Firefox code base in this repository and is not duplicated in the other repo
If you are having issues with the extension, feel free to open an issue here on the GitHub Repo.
You can click on the issues tab at the top of the page and click new issue. Describe the issue you encountered and what you did to cause it to happen.
This extension was started with the help of Extensionizr. As well as the documentation provided by the Google for Chrome Developers and the documentation from Mozilla