Examine source code of Zulu

{
  "manifest_version": 2,
  "name": "Zulu",
  "short_name": "Zulu",
  "description": "__MSG_extensionDescription__",
  "version": "3.1.2resigned1",
  "author": "Sangoma Technologies, INC",
  "default_locale": "en_US",
  "icons": {
    "24": "icons/icon24.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "192": "icons/icon192.png"
  },
  "browser_action": {
    "default_title": "Zulu",
    "default_icon": {
      "24": "icons/icon24.png",
      "48": "icons/icon48.png",
      "96": "icons/icon96.png",
      "192": "icons/icon192.png"
    },
    "default_popup": "browser_action/popup.html"
  },
  "background": {
    "scripts": [
      "includes/browser.js",
      "includes/functions.js",
      "background.js"
    ],
    "persistent": true
  },
  "options_ui": {
    "page": "options_ui/options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "includes/browser.js",
        "includes/findAndReplaceDOMText.js",
        "includes/functions.js",
        "content_script/zulu.client.js"
      ],
      "css": [
        "includes/font.css",
        "content_script/content.css"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "activeTab",
    "contextMenus",
    "notifications",
    "storage",
    "unlimitedStorage",
    "nativeMessaging"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@zulufirefoxplugin"
    }
  }
}