Examine source code of GrayFlash

{
  "theme": {
    "images": {
      "theme_frame": "GrayP.jpg"
    },
    "colors": {
      "frame": "#88858a",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "GrayFlash",
  "manifest_version": 2,
  "description": "This Persona is simple but yet beautiful. Gives your Firefox a metallic look in the Header and kind of a leather look in the footer."
}