Wow that is a lot of Github commits. The last release is about a month ago... Have you ever tried using the bleeding edge code? Looking at https://developer.

Wow that is a lot of Github commits. The last release is about a month ago... Have you ever tried using the bleeding edge code? Looking at https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Your_first_WebExtension#Installing https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Yo... it seems like it might be possible, but you'd have to manually 'install' the extension every time you start Firefox...