Examine source code of Fire-Foxgirl 2

{
  "theme": {
    "images": {
      "theme_frame": "Firefoxgirl2-header.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Fire-Foxgirl 2",
  "manifest_version": 2,
  "description": "An anime-style foxgirl lying innocently atop a globe, with an orange abstract background. Alternate version of my \"Fire-Foxgirl\" Persona using a different version of Firefox-tan."
}