Examine source code of Hunt

{
  "name": "Hunt",
  "version": "1.0.4",
  "description": "Hunt automatically finds coupons and discounts when you shop online. Saving money has never been easier!",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "icon-disabled-16.png",
      "24": "icon-disabled-24.png",
      "32": "icon-disabled-32.png",
      "48": "icon-disabled-48.png",
      "96": "icon-disabled-96.png",
      "128": "icon-disabled-128.png"
    }
  },
  "icons": {
    "16": "icon-manifest-16.png",
    "24": "icon-manifest-24.png",
    "32": "icon-manifest-32.png",
    "48": "icon-manifest-48.png",
    "96": "icon-manifest-96.png",
    "128": "icon-manifest-128.png"
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "cookies",
    "tabs",
    "webRequest",
    "webRequestBlocking"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "firefox-extension@hunt"
    }
  }
}