Examine source code of YouTube Bookmarker

{
  "manifest_version": 2,
  "name": "YouTube Bookmarker",
  "version": "1.0",
  "description": "Bookmark YouTube videos with timestamps.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "YouTube Bookmarker"
  },
  "permissions": [
    "tabs",
    "storage",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "rumman@rantages.com"
    }
  }
}