Examine source code of Piercing Stare

{
  "theme": {
    "images": {
      "theme_frame": "piercing-stare.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Piercing Stare",
  "manifest_version": 2,
  "description": "A pair of eyes staring hypnotically at you. Derived from a public-domain photo on Wikipedia."
}