Examine source code of Custom Auto Refresh

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "short_name": "__MSG_extensionShortName__",
  "version": "3.0.1",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "homepage_url": "https://github.com/VastBlast/custom-auto-refresh",
  "icons": {
    "16": "icons/inactive/icon16.png",
    "32": "icons/inactive/icon32.png",
    "48": "icons/inactive/icon48.png",
    "128": "icons/inactive/icon128.png"
  },
  "action": {
    "default_title": "__MSG_actionTitle__",
    "default_popup": "index.html",
    "default_icon": {
      "16": "icons/inactive/icon16.png",
      "24": "icons/inactive/icon24.png",
      "32": "icons/inactive/icon32.png"
    }
  },
  "background": {
    "scripts": [
      "assets/background.js"
    ],
    "type": "module"
  },
  "permissions": [
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'; script-src 'self'; object-src 'none'; img-src 'self' data:; style-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "custom-auto-refresh@example.local",
      "strict_min_version": "126.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}