Examine source code of Firefox Gold

{
  "theme": {
    "images": {
      "theme_frame": "firefox_header.jpg"
    },
    "colors": {
      "frame": "#ffea00",
      "tab_background_text": "#543900"
    }
  },
  "version": "2.0",
  "name": "Firefox Gold",
  "manifest_version": 2,
  "description": "A mod of the standard firefox \"colorful\" persona - without that horrid lime green tinge."
}