Web components, sometimes mixed up with the Shadow DOM, are now available in Firefox v29+ under this flag – but they won’t be available to the average end-user. How to Enable: In your address bar, go to: about:config Search for the property: dom.webcomponents.enabled and mark it as true. If your already on a development page, remember to reload it. Further Reading http://css-tricks.com/modular-future-web-components/ http://oliversmith.io/technology/2012/05/19/inspecting-the-shadow-dom-in-...
