Examine source code of HaSe

{
  "manifest_version": 2,
  "name": "HaSe",
  "version": "1.1",
  "description": "Diese Browser-Extension integriert den HaSen in den Buchungsprozess der Bahn. Hilfeleistung angefragt mit einem Klick.",
  "homepage_url": "https://hase.app",
  "icons": {
    "16": "icons/Logo_HaSe_16.png",
    "48": "icons/Logo_HaSe_48.png",
    "96": "icons/Logo_HaSe_96.png",
    "128": "icons/Logo_HaSe_128.png"
  },
  "permissions": [
    "https://hase.app/",
    "cookies"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/Logo_HaSe_16.png",
      "48": "icons/Logo_HaSe_48.png",
      "96": "icons/Logo_HaSe_96.png",
      "128": "icons/Logo_HaSe_128.png"
    },
    "default_title": "HaSe",
    "default_popup": "popup/index.html"
  },
  "web_accessible_resources": [
    "popup/js/*.js",
    "popup/css/*.css"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://reiseauskunft.bahn.de/*"
      ],
      "js": [
        "booking.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}