Examine source code of Sharkbite

{
  "theme": {
    "images": {
      "theme_frame": "header3.jpg"
    },
    "colors": {
      "frame": "#359988",
      "tab_background_text": "#1c3030"
    }
  },
  "version": "2.0",
  "name": "Sharkbite",
  "manifest_version": 2,
  "description": "A nice image of a sand tiger shark to float over your browser section."
}