Examine source code of Headlinedesign

{
  "theme": {
    "images": {
      "theme_frame": "Firefox-Persona-Header.jpg"
    },
    "colors": {
      "frame": "#ada",
      "tab_background_text": "#ada"
    }
  },
  "version": "2.0",
  "name": "Headlinedesign",
  "manifest_version": 2,
  "description": "Headlinedesign Persona"
}