Examine source code of destinationsmart

{
  "theme": {
    "images": {
      "theme_frame": "destination_persona.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "destinationsmart",
  "manifest_version": 2,
  "description": "Show your solidarity to the smart car community by adding the destinationsmart Persona to your web browser, the perfect way to keep up to date with all the latest smart news! Read all about it at <a href=\"https://outgoing.prod.mozaws.net/v1/5743aab6dc6b25db21bb7e02f8071e304a70bd406619392782f995a3c9783b88/http%3A//www.destinationsmart.co.uk\" rel=\"nofollow\">www.destinationsmart.co.uk</a>"
}