webextensions-examples
Example Firefox add-ons created using the WebExtensions API.
To use these examples, you need at least Firefox 45. Some examples rely on
APIs that were added in more recent versions of Firefox. To check the minimum
version of Firefox needed for a given example, see the strict_min_version
part of the applications key in the example's manifest.json file.
https://developer.mozilla.org/en-US/Add-ons/WebExtensions/manifest.json/applications
To test out an extension in Firefox, see Packaging and Installation.
To see details of each extension, what it does and what it demonstrates, see the WebExtensions Examples page.