Examine source code of Shopping Fake Headers

{
  "name": "Shopping Fake Headers",
  "description": "Fake Headers for iOS, Android in Web, Mshop and Kindle App",
  "version": "1.1",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "resources/image_low.png",
    "48": "resources/image_medium.png",
    "128": "resources/image_high.png"
  },
  "permissions": [
    "storage",
    "cookies",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "incognito": "spanning",
  "browser_action": {
    "default_icon": "resources/image_medium.png",
    "default_popup": "main.html"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{e8b7552d-a306-402b-9e86-9f39c13e2075}"
    }
  }
}