Examine source code of PrivateX

{
  "manifest_version": 2,
  "name": "PrivateX",
  "version": "2.2resigned1",
  "description": "This add-on lets the user open websites with critical user information [Like banking, travel sites, etc] in a private window, without the hassle of copying the URL. In-case an URL doesn't work, mail us at jyotsna17gupta [AT] gmail [DOT] com.",
  "homepage_url": "https://github.com/jyotsna17gupta/PrivateX",
  "icons": {
    "16": "icons/unsafe-16.png",
    "32": "icons/unsafe-32.png",
    "48": "icons/unsafe-48.png",
    "64": "icons/unsafe-64.png",
    "128": "icons/unsafe-128.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "activeTab",
    "tabs"
  ],
  "page_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icons/unsafe-16.png",
      "32": "icons/unsafe-32.png",
      "48": "icons/unsafe-48.png"
    },
    "default_title": "Click here for Private browsing!"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2197a168-d094-4df7-8c1f-21f14035f374}"
    }
  }
}