You can install Beyond20 by visiting the Chrome Webstore and clicking the Add to Chrome
button.
For those using Firefox, the extension is now available on the Mozilla Add-ons website, simply click the Add to Firefox
button to get it installed.
For those using MS Edge, the extension is now available on the Edge Add-ons website and click the Get
button to get it installed.
If you want to download, review and/or learn from the source code of this extension, feel free to head over to the github repository page to download the latest version.
You can download the source code directly from github (click the green Clone or download
button) and follow the instructions in the README file on how to install it into Chrome or Firefox from the source directory.