Examine source code of Chowder

{
  "theme": {
    "images": {
      "theme_frame": "chowder.jpg"
    },
    "colors": {
      "frame": "#c9c9c9",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Chowder",
  "manifest_version": 2,
  "description": "Download an official Persona for Chowder! Visit <a href=\"https://outgoing.prod.mozaws.net/v1/f8f9a4389e0bd15a08d774d006288843a5671e11e02a93619dbf2d2c4eb65206/http%3A//www.cartoonnetwork.co.uk\" rel=\"nofollow\">www.cartoonnetwork.co.uk</a> for more free Chowder downloads and watch the TV show on Cartoon Network UK."
}