Examine source code of Auctionoton — Auction House Prices for Wowhead

{
  "manifest_version": 2,
  "name": "Auctionoton: Auction House Prices for Wowhead",
  "version": "3.2.8",
  "description": "Display current Auction House price data for items on wowhead.com",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "index.js"
      ]
    },
    {
      "matches": [
        "https://tbc.wowhead.com/*",
        "https://wotlk.wowhead.com/*",
        "https://wowhead.com/wotlk/*",
        "https://www.wowhead.com/wotlk/*"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "index.js",
    "form.html"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "static/icon.png",
    "default_popup": "form.html",
    "default_title": "Auctionoton: Auction House Prices for Wowhead"
  },
  "options_ui": {
    "page": "form.html",
    "open_in_tab": true,
    "browser_style": false,
    "chrome_style": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "auctiono@ton.com"
    }
  },
  "icons": {
    "16": "static/icon-16.png",
    "32": "static/icon-32.png",
    "48": "static/icon-48.png",
    "128": "static/icon-128.png"
  },
  "permissions": [
    "storage",
    "https://api.ahdfw.nl/*",
    "https://*.ngrok.io/*",
    "https://5d9b-82-168-31-31.ngrok.io/*",
    "https://auctionoton-production.up.railway.app/*",
    "https://develop--auctionoton-server.herokuapp.com/*",
    "https://auctionoton-edge-api-sandervspl.vercel.app/api/*",
    "https://auctionoton-edge-api.vercel.app/api/*"
  ]
}