Examine source code of Hilly Sunrise

{
  "theme": {
    "images": {
      "theme_frame": "HillySunrise.jpg"
    },
    "colors": {
      "frame": "#f2dc6f",
      "tab_background_text": "#dcf4f7"
    }
  },
  "version": "2.0",
  "name": "Hilly Sunrise",
  "manifest_version": 2,
  "description": "Fresh morning light spills gently onto the green, swelling hills."
}