Examine source code of Freemans Bot - Rust+ Connect

{
  "manifest_version": 2,
  "name": "Freemans Bot - Rust+ Connect",
  "version": "1.0.3",
  "description": "Links your Rust+ Steam sign-in to the Freemans bot website - no download or manual setup required.",
  "browser_specific_settings": {
    "gecko": {
      "id": "rustplus-connect@freemans-bot",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "notifications",
    "tabs",
    "https://companion-rust.facepunch.com/*",
    "https://thewolves.up.railway.app/*"
  ],
  "background": {
    "scripts": [
      "config.js",
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://thewolves.up.railway.app/*"
      ],
      "js": [
        "site-bridge.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://companion-rust.facepunch.com/*"
      ],
      "js": [
        "inject.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "https://companion-rust.facepunch.com/*"
      ],
      "js": [
        "content-bridge.js"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}