Examine source code of Couponifier.com

{
  "manifest_version": 2,
  "name": "Couponifier.com",
  "short_name": "Couponifier.com",
  "version": "1.1",
  "description": "Get coupons and deals for hundreds of thousands of stores online",
  "author": "Couponifier.com",
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "http://*/",
    "https://*/"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "web_accessible_resources": [
    "css/*.css",
    "js/*.js",
    "libs/*.js",
    "html/*.html",
    "data/*.json",
    "images/*.png",
    "images/*.gif",
    "images/*.jpg"
  ],
  "background": {
    "scripts": [
      "js/background/helpers.js",
      "js/background/file-reader.js",
      "js/background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": {
      "19": "images/icon19.png",
      "38": "images/icon38.png"
    },
    "default_title": "Couponifier.com",
    "default_popup": "html/popup.html"
  },
  "options_ui": {
    "chrome_style": true,
    "page": "html/popup.html"
  }
}