Examine source code of Json Bonito

{
  "manifest_version": 2,
  "name": "Json Bonito",
  "version": "3.0.2",
  "description": "Beautiful JSON formatter — opens in a full tab for comfortable editing.",
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "icon48.png",
      "96": "icon96.png",
      "128": "icon128.png"
    },
    "default_title": "Json Bonito"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "jsonbonito@senin.org"
    }
  }
}