Examine source code of Doctor Octopus

{
  "theme": {
    "images": {
      "theme_frame": "DoctorOctopusHeader.jpg"
    },
    "colors": {
      "frame": "#7a7a7a",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Doctor Octopus",
  "manifest_version": 2,
  "description": "The power of the sun in the palm of my hand."
}