Examine source code of Generate strong passwords

{
  "manifest_version": 2,
  "name": "Generate strong passwords randomly",
  "version": "1.0",
  "description": "Generate strong passwords randomly",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_title": "Generate strong passwords randomly",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e166721d-5b2b-40cc-a2d0-5a7959b2c0fc}"
    }
  }
}