Examine source code of VistaFox_Yellow

{
  "theme": {
    "images": {
      "theme_frame": "VistaFox_yellow.jpg"
    },
    "colors": {
      "frame": "#e8e400",
      "tab_background_text": "#e8e400"
    }
  },
  "version": "2.0",
  "name": "VistaFox_Yellow",
  "manifest_version": 2,
  "description": "A yellow, Vista - styled Persona for Firefox."
}