scsnowmanify This is a very simple extension for Firefox Browser to replace the active tab's content with an scsnowman. ☃ Feature Toggle replacing with an scsnowman image when the icon in toolbar is clicked. Try scsnowmanify locally yarn install yarn start:firefox See also https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Your_second_WebExtension https://github.com/aminophen/scsnowman