Examine source code of cat eye for you

{
  "theme": {
    "images": {
      "theme_frame": "top.jpg"
    },
    "colors": {
      "frame": "#88e683",
      "tab_background_text": "#344a08"
    }
  },
  "version": "2.0",
  "name": "cat eye for you",
  "manifest_version": 2,
  "description": "cat eye of different color looking at you when you are using firefox"
}