Examine source code of WeakestLink

{
  "manifest_version": 2,
  "name": "WeakestLink",
  "description": "Extracts users from the currently viewed LinkedIn company page",
  "version": "2.6",
  "content_security_policy": "font-src data:; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-eval'; object-src 'self';",
  "background": {
    "scripts": [
      "event.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/logo16.png",
      "32": "images/logo32.png",
      "48": "images/logo48.png",
      "128": "images/logo128.png"
    }
  },
  "permissions": [
    "http://www.linkedin.com/*",
    "https://www.linkedin.com/*",
    "downloads",
    "webNavigation",
    "storage",
    "cookies"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{88579932-a7fb-4943-b6df-ccfd5151334b}"
    }
  }
}