Examine source code of PinkOctopus

{
  "theme": {
    "images": {
      "theme_frame": "firefoxoctopus.jpeg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#f2b5e2"
    }
  },
  "version": "2.0",
  "name": "PinkOctopus",
  "manifest_version": 2,
  "description": "For all those who love octopuses!"
}