Examine source code of Zintlr

{
  "short_name": "Zintlr",
  "name": "Zintlr",
  "description": "Tool designed to enable businesses to find potential revenue-generating contacts easily & quickly on any site & LinkedIn.",
  "version": "0.0.0.2",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "backgroundFirefox.js"
    ]
  },
  "permissions": [
    "tabs",
    "activeTab",
    "scripting",
    "cookies",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "content.css"
      ],
      "js": [
        "contentFirefox.js"
      ],
      "match_about_blank": false,
      "exclude_matches": [
        "https://*.google.com/*"
      ]
    }
  ],
  "web_accessible_resources": [],
  "content_security_policy": "default-src 'self' http://localhost:*; style-src 'unsafe-inline' 'self'; font-src 'self'; script-src 'self'; connect-src 'self' https://extension.zintlr.com http://localhost:*",
  "browser_action": {
    "default_popup": "popupFirefox.html",
    "default_icon": {
      "16": "logo16.png",
      "32": "logo32.png",
      "48": "logo48.png",
      "128": "logo128.png",
      "192": "logo192.png",
      "512": "logo512.png"
    }
  },
  "icons": {
    "16": "logo16.png",
    "32": "logo32.png",
    "48": "logo48.png",
    "128": "logo128.png",
    "192": "logo192.png",
    "512": "logo512.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{304d8234-155c-433b-ba82-ce3793a29d0c}"
    }
  }
}