Examine source code of Sequential Tab Refresher

{
  "manifest_version": 2,
  "name": "Sequential Tab Refresher",
  "version": "1.1",
  "description": "Refresh all tabs when visiting an unloaded tab",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d78eb543-988c-4166-9b6a-8dc73ecc02dd}"
    }
  }
}