Examine source code of Moodle Auto Refresh

{
  "manifest_version": 3,
  "name": "Moodle Auto Refresh",
  "version": "2.0.1",
  "description": "Keeps your Moodle session alive to prevent being signed out.",
  "homepage_url": "https://github.com/justin-chiam/moodle-auto-refresh",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "tabs",
    "alarms",
    "scripting"
  ],
  "host_permissions": [
    "https://moodle.telt.unsw.edu.au/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Moodle Auto Refresh"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2e4b1767-c9ba-41d0-90ee-8fe730c80620}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}