Examine source code of ServiceNow Toggle NavBar

{
  "manifest_version": 2,
  "name": "ServiceNow Toggle NavBar",
  "version": "1.0",
  "description": "Toggles Servicenow Nav Bar (not affiliated with servicenow - personal work)",
  "homepage_url": "https://www.instagram.com/dave.chk",
  "icons": {
    "16": "icons/SN-16.png",
    "32": "icons/SN-32.png"
  },
  "permissions": [
    "activeTab"
  ],
  "page_action": {
    "show_matches": [
      "https://*.service-now.com/*"
    ],
    "default_icon": {
      "16": "icons/SN-16.png",
      "32": "icons/SN-32.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}