Examine source code of ORGANIZE+

{
  "manifest_version": 2,
  "name": "ORGANIZE+",
  "version": "1.0",
  "description": "Implements automatic ORGANIZE+ sorting to Firefox bookmarks and YouTube playlists.",
  "icons": {
    "48": "environment/icons/logo.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "environment/icons/logo.png",
      "38": "environment/icons/logo.png"
    },
    "default_title": "ORGANIZE+",
    "default_popup": "environment/button.html"
  },
  "background": {
    "scripts": [
      "zones/firefox/firefox.js"
    ],
    "persistent": false
  },
  "permissions": [
    "bookmarks"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "zones/youtube/youtube.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ce655cae-5ba7-4fe1-84e5-89459fdaeb87}"
    }
  }
}