Examine source code of Cat BackPack

{
  "name": "Cat BackPack",
  "description": "this extension is about backpack shopping. The Cat BackPack site is the shopping site which allow you to find the best backpack for you",
  "version": "0.0.0.1",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [],
  "browser_action": {},
  "manifest_version": 2,
  "icons": {
    "128": "logo.png"
  }
}