Examine source code of PassGuard

{
  "manifest_version": 2,
  "name": "Password Guard",
  "version": "1.0",
  "description": "A simple extension that store your username and password privately in your account.",
  "homepage_url": "https://github.com/leong34/PassGuard",
  "icons": {
    "48": "icons/guardx48.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/guardx48.png",
    "default_title": "Password Guard",
    "default_popup": "popup/guard.html"
  }
}