Examine source code of riverandfox

{
  "theme": {
    "images": {
      "theme_frame": "riverandfox2.jpg"
    },
    "colors": {
      "frame": "#3382b0",
      "tab_background_text": "#0f0d0d"
    }
  },
  "version": "2.0",
  "name": "riverandfox",
  "manifest_version": 2,
  "description": "River and Fox are watching."
}