Examine source code of Auto Coupon Finder

{
  "manifest_version": 2,
  "name": "Auto Coupon Finder",
  "version": "1.0",
  "description": "Automatically search for and apply the best discount coupons during checkout.",
  "permissions": [
    "activeTab",
    "storage",
    "webRequest",
    "https://*/"
  ],
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "32": "icons/logo_32.png",
      "64": "icons/logo_64.png",
      "128": "icons/logo_128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{19ff2483-c7f1-413a-a992-f715bc0c8e05}"
    }
  }
}