Examine source code of YT-Bookmarker

{
  "name": "YT-Bookmarker",
  "version": "1.1",
  "description": "Saving timestamps for YouTube videos",
  "permissions": [
    "https://*.youtube.com/*",
    "tabs",
    "activeTab",
    "unlimitedStorage",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js",
      "model.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "js": [
        "assets/js/jquery.js",
        "contentScript.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "assets/images/AddBookmark.png"
  ],
  "browser_action": {
    "default_icon": {
      "16": "assets/images/HatenaBookmark_16.png",
      "24": "assets/images/HatenaBookmark_24.png",
      "32": "assets/images/HatenaBookmark_32.png",
      "48": "assets/images/HatenaBookmark_48.png",
      "96": "assets/images/HatenaBookmark_96.png"
    },
    "default_title": "YT Bookmarks",
    "default_popup": "popup.html"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{fb41b641-8869-439f-84bd-cf1c95eb1666}"
    }
  }
}