Examine source code of WilhelmVonDith

{
  "theme": {
    "images": {
      "theme_frame": "firefoxvondith.jpg"
    },
    "colors": {
      "frame": "#a8a8a8",
      "tab_background_text": "#bfb2b2"
    }
  },
  "version": "2.0",
  "name": "WilhelmVonDith",
  "manifest_version": 2,
  "description": "Von Dith"
}