Examine source code of Warning Goose

{
  "name": "Warning Goose",
  "description": "Warning Goose - Crowdsourced Privacy Alert",
  "version": "1.1.3",
  "manifest_version": 2,
  "author": "Warning Goose",
  "homepage_url": "https://warninggoose.net",
  "offline_enabled": false,
  "short_name": "Warning Goose",
  "icons": {
    "16": "img/icon-16.png",
    "32": "img/icon-32.png",
    "48": "img/icon-48.png",
    "96": "img/icon-96.png",
    "128": "img/icon-128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "img/icon-16.png",
      "32": "img/icon-32.png",
      "48": "img/icon-48.png",
      "96": "img/icon-96.png",
      "128": "img/icon-128.png"
    },
    "default_popup": "popup/index.html",
    "default_title": "Warning Goose"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "build/js/jquery-3.4.1.min.js",
        "build/js/app.js"
      ],
      "run_at": "document_start",
      "css": [
        "build/css/style.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "build/js/background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "web_accessible_resources": [
    "public/*"
  ]
}