Examine source code of Automatic Deal Finder

{
  "name": "Automatic Deal Finder",
  "short_name": "Find your coupons",
  "description": "Find coupons here",
  "version": "2.0.2",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/contentscript.js"
      ]
    }
  ],
  "icons": {
    "16": "images/icon-16x16.png",
    "128": "images/icon-128x128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "images/icon-16x16.png",
      "48": "images/icon-48x48.png"
    },
    "default_title": "Automatic Deal Finder",
    "default_popup": "index.html"
  },
  "omnibox": {
    "keyword": "coupon"
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "permissions": [
    "clipboardWrite",
    "history",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6c804910-2729-485f-bb7d-57c8bc3cfd60}"
    }
  }
}