Examine source code of One Shot...One Kill

{
  "theme": {
    "images": {
      "theme_frame": "sniper.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#ff0000"
    }
  },
  "version": "2.0",
  "name": "One Shot...One Kill",
  "manifest_version": 2,
  "description": "Sniping persona.  I realize it's not that great, but I only have paint to work with."
}