Examine source code of Translucent Glass

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Translucent Glass",
  "manifest_version": 2,
  "description": "This theme allows the UI to have a frosted glass-like transparency, showing through the color of your desktop wallpaper.\n\nThis requires Firefox Version 29 or newer to function properly. Any older version will show up as pure white instead. It might also be specific to Windows 7 users who have Aero enabled."
}