Examine source code of Tab Sound Personalizer

{
  "manifest_version": 2,
  "name": "Tab Sound Personalizer",
  "version": "1.0",
  "description": "Play ambient sounds per tab (e.g., rain, forest, lofi) to boost focus.",
  "permissions": [
    "tabs",
    "storage",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "web_accessible_resources": [
    "sounds/*.mp3"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d2fc814f-4735-40cc-a041-fd56ba764f97}"
    }
  }
}