Examine source code of JSON Beautify It

{
  "manifest_version": 2,
  "name": "JSON Beautify It",
  "description": "Tool for beautifying JSON data, AJAX or API responses in browser",
  "version": "1.0.3resigned1",
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png"
    },
    "default_title": "Beautify JSON data on this page"
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "background": {
    "scripts": [
      "main.js"
    ],
    "persistent": false
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0ed7e2c0-53f4-4d35-a701-577797c14b80}"
    }
  }
}