Examine source code of Simple Tab Refresh

{
  "manifest_version": 3,
  "name": "Simple Tab Refresher",
  "version": "1.0.1",
  "description": "Refresh the current tab automatically at a user-defined interval.",
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Simple Tab Refresher",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "48": "icon-48.png",
      "64": "icon-64.png",
      "96": "icon-96.png",
      "128": "icon-128.png"
    }
  },
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "64": "icon-64.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "panicrefresher@paniclooplabs.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}