Examine source code of Original - 1CZBGRBN

{
  "theme": {
    "images": {
      "theme_frame": "Header1.png"
    },
    "colors": {
      "frame": "#3d3d3d",
      "tab_background_text": "#ffcd05"
    }
  },
  "version": "2.0",
  "name": "Original - 1CZBGRBN",
  "manifest_version": 2,
  "description": "The Original version of the 1CZBGRBN Firefox Persona\n\nOriginally designed for Firefox 3.6(?)"
}