Examine source code of GreenGhost

{
  "manifest_version": 2,
  "name": "meinTheme",
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "hintergrundbild.jpg"
    },
    "colors": {
      "frame": "#F2F7EB",
      "tab_background_text": "#000000",
      "toolbar": "#F2F7EB",
      "toolbar_text": "#2E5508",
      "tab_background_separator": "#539200"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a323d414-c63a-461d-9874-7c224daf2cd6}"
    }
  }
}