Examine source code of My Simple Auto Refresher

{
  "manifest_version": 2,
  "name": "My Simple Auto Refresher",
  "version": "1.0",
  "description": "Automatically refreshes the active tab. Click icon for options. You can set interval in seconds, turn refresh on or off. Minimum permissions required, can't read page data, does not send any data anywhere, nothing obfuscated.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    },
    "default_title": "Auto Refresher Settings",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{89448431-2a17-4021-8295-85144513a6e8}"
    }
  }
}