Examine source code of Headphones Back to Phone

{
  "manifest_version": 3,
  "name": "Headphones Back to Phone",
  "short_name": "BackToPhone",
  "version": "0.3.1",
  "description": "Stops a silent site sound so your headphones go back to your phone.",
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "*://aliexpress.com/*",
    "*://*.aliexpress.com/*",
    "*://aliexpress.us/*",
    "*://*.aliexpress.us/*",
    "*://aliexpress.ru/*",
    "*://*.aliexpress.ru/*",
    "*://aliexpress.fr/*",
    "*://*.aliexpress.fr/*",
    "*://aliexpress.de/*",
    "*://*.aliexpress.de/*",
    "*://aliexpress.es/*",
    "*://*.aliexpress.es/*",
    "*://aliexpress.it/*",
    "*://*.aliexpress.it/*",
    "*://aliexpress.nl/*",
    "*://*.aliexpress.nl/*",
    "*://aliexpress.co.uk/*",
    "*://*.aliexpress.co.uk/*",
    "*://aliexpress.com.br/*",
    "*://*.aliexpress.com.br/*",
    "*://aliexpress.com.tr/*",
    "*://*.aliexpress.com.tr/*",
    "*://temu.com/*",
    "*://*.temu.com/*",
    "https://extensionpay.com/*"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "BackToPhone — headphones back to your phone",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://aliexpress.com/*",
        "*://*.aliexpress.com/*",
        "*://aliexpress.us/*",
        "*://*.aliexpress.us/*",
        "*://aliexpress.ru/*",
        "*://*.aliexpress.ru/*",
        "*://aliexpress.fr/*",
        "*://*.aliexpress.fr/*",
        "*://aliexpress.de/*",
        "*://*.aliexpress.de/*",
        "*://aliexpress.es/*",
        "*://*.aliexpress.es/*",
        "*://aliexpress.it/*",
        "*://*.aliexpress.it/*",
        "*://aliexpress.nl/*",
        "*://*.aliexpress.nl/*",
        "*://aliexpress.co.uk/*",
        "*://*.aliexpress.co.uk/*",
        "*://aliexpress.com.br/*",
        "*://*.aliexpress.com.br/*",
        "*://aliexpress.com.tr/*",
        "*://*.aliexpress.com.tr/*",
        "*://temu.com/*",
        "*://*.temu.com/*"
      ],
      "js": [
        "page-hook.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "*://aliexpress.com/*",
        "*://*.aliexpress.com/*",
        "*://aliexpress.us/*",
        "*://*.aliexpress.us/*",
        "*://aliexpress.ru/*",
        "*://*.aliexpress.ru/*",
        "*://aliexpress.fr/*",
        "*://*.aliexpress.fr/*",
        "*://aliexpress.de/*",
        "*://*.aliexpress.de/*",
        "*://aliexpress.es/*",
        "*://*.aliexpress.es/*",
        "*://aliexpress.it/*",
        "*://*.aliexpress.it/*",
        "*://aliexpress.nl/*",
        "*://*.aliexpress.nl/*",
        "*://aliexpress.co.uk/*",
        "*://*.aliexpress.co.uk/*",
        "*://aliexpress.com.br/*",
        "*://*.aliexpress.com.br/*",
        "*://aliexpress.com.tr/*",
        "*://*.aliexpress.com.tr/*",
        "*://temu.com/*",
        "*://*.temu.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "world": "ISOLATED"
    }
  ],
  "optional_permissions": [
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "fingerprintmute@andreasne89",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}