Examine source code of Clear web(Validation)

{
  "manifest_version": 2,
  "name": "Clear web",
  "version": "0.9",
  "description": "Clear web par Patb-Dev",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "sketch/front.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "sketch/back.js"
    ],
    "persistent": false
  },
  "browser_action": {},
  "icons": {
    "16": "icons/PatOff.png",
    "48": "icons/PatOff.png",
    "128": "icons/PatOff.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a263b85a-8ee1-486a-b20c-b091b513999f}"
    }
  }
}