Examine source code of Zoom Tab Close

{
  "manifest_version": 2,
  "name": "Zoom Tab Close",
  "version": "1.2",
  "description": "Auto-closes Zoom videoconferencing tabs when a meeting is successfully joined.",
  "icons": {
    "48": "icons/baseline_close_black_24dp.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs"
  ]
}