Examine source code of Custom Sounds

{
  "manifest_version": 3,
  "name": "Custom Sounds",
  "version": "1.1.0",
  "author": "Kirutre",
  "description": "Add customizable sounds to your browser",
  "homepage_url": "https://github.com/Kirutre/custom_sounds",
  "browser_specific_settings": {
    "gecko": {
      "id": "custom_sounds@kirutre",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "svg/icon.svg"
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "action": {
    "default_icon": "svg/icon.svg",
    "default_title": "Custom Sounds"
  }
}