Examine source code of Picky

{
  "browser_specific_settings": {
    "gecko": {
      "id": "Picky.xpi@alfish.bitbucket.io"
    }
  },
  "default_locale": "en",
  "name": "__MSG_manifestName__",
  "version": "0.0.1",
  "description": "__MSG_manifestDescription__",
  "icons": {
    "16": "icon/Picky-16.png",
    "48": "icon/Picky-48.png",
    "128": "icon/Picky-128.png"
  },
  "incognito": "spanning",
  "permissions": [
    "storage"
  ],
  "page_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon/Picky-16.png",
      "48": "icon/Picky-48.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "all_frames": false,
      "run_at": "document_idle",
      "js": [
        "YouTube/content.js",
        "YouTube/Picky_YouTube.fn.js"
      ]
    }
  ],
  "manifest_version": 2
}