Examine source code of Scinat Library

{
  "name": "Scinat Library",
  "description": "Scinat Library Resource Extension",
  "version": "1.0",
  "icons": {
    "48": "images.png"
  },
  "background": {
    "scripts": [
      "browser-polyfill.min.js",
      "js/jquery.js",
      "util.js",
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "http://www.wytsg.com/api/main_wytsg.php"
      ],
      "js": [
        "browser-polyfill.min.js",
        "content.js"
      ]
    },
    {
      "matches": [
        "http://*.wytsg.com/*"
      ],
      "run_at": "document_end",
      "css": [
        "css/styles.css"
      ],
      "js": [
        "browser-polyfill.min.js",
        "js/jquery.js",
        "util.js",
        "snail.js"
      ]
    },
    {
      "matches": [
        "http://*/*"
      ],
      "run_at": "document_start",
      "css": [
        "css/styles.css"
      ],
      "js": [
        "browser-polyfill.min.js",
        "js/jquery.js",
        "repower.js"
      ]
    }
  ],
  "homepage_url": "http://www.wytsg.com",
  "permissions": [
    "tabs",
    "storage",
    "http://*/",
    "https://*/",
    "webRequest",
    "webRequestBlocking",
    "cookies",
    "webNavigation",
    "notifications",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "scinaterra@outlook.com",
      "strict_min_version": "58.0"
    }
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "48": "images.png"
    },
    "default_title": "Scinat Library"
  }
}