Examine source code of Big Refresh Button

{
  "manifest_version": 2,
  "name": "Big Refresh Button",
  "description": "Easy to see button to refresh the current page.",
  "version": "1.0.1resigned1",
  "author": "mluc",
  "permissions": [
    "alarms"
  ],
  "icons": {
    "300": "icons/refresh.svg"
  },
  "browser_action": {
    "default_title": "Refresh Page",
    "default_icon": {
      "300": "icons/refresh.svg"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bcbd8b23-d3ff-4460-9301-fce8581cde49}"
    }
  }
}