Examine source code of MarketApp P2P

{
  "manifest_version": 3,
  "name": "MarketApp P2P",
  "description": "Creates P2P exchanges between steam users",
  "version": "1.8.0",
  "action": {
    "default_title": "MarketApp P2P",
    "default_icon": "img/favicon_csgo.png",
    "default_popup": "popup.html"
  },
  "default_locale": "en",
  "background": {
    "scripts": [
      "js/background.js",
      "js/offscreen.js",
      "js/vendor.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "https://steamcommunity.com/profiles/*",
        "https://steamcommunity.com/id/*",
        "https://steamcommunity.com/*/*/tradeoffers",
        "https://steamcommunity.com/*/*/tradeoffers/*",
        "https://steamcommunity.com/*/*/inventory",
        "https://steamcommunity.com/*/*/inventory/*",
        "https://steamcommunity.com/market/listings/730/*",
        "https://steamcommunity.com/market*"
      ],
      "js": [
        "js/vendor.js",
        "js/inject.js"
      ]
    }
  ],
  "permissions": [
    "notifications",
    "storage",
    "cookies",
    "tabs",
    "activeTab",
    "declarativeNetRequest",
    "alarms"
  ],
  "host_permissions": [
    "https://steamcommunity.com/*",
    "https://api.steampowered.com/*",
    "https://market.csgo.com/*",
    "https://api.marketapp.online/*",
    "https://dota2.net/*",
    "https://open.faceit.com/*",
    "https://hasura.fastcup.net/*"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "icons": {
    "16": "img/favicon_csgo_16.png",
    "48": "img/favicon_csgo_48.png",
    "128": "img/favicon_csgo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "admin@csgo.com",
      "strict_min_version": "113.0"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "app.html",
        "app.js"
      ],
      "matches": []
    }
  ]
}