Distribute extension to more browsers

https://addons.mozilla.org/en-US/firefox/
https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Publishing_your_WebExtension

https://addons.opera.com/en/
https://dev.opera.com/extensions/publishing-guidelines/#submit

https://www.microsoft.com/en-us/store/collections/edgeextensions/pc
(invite only for the time being)