Examine source code of JSON Editor

{
  "manifest_version": 2,
  "name": "JSON Editor Extension",
  "version": "2.0.0",
  "description": "A JSON Editor Extension based on JSON Editor Online",
  "background": {
    "scripts": [
      "main.js"
    ]
  },
  "icons": {
    "128": "img/icon.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "img/icon.png",
    "default_title": "JSON Editor Extension"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a92b3390-748a-4766-876c-651b06f91328}"
    }
  }
}