Examine source code of Auto Minimize Tab Groups

{
  "manifest_version": 2,
  "name": "Auto Minimize Tab Groups",
  "author": "yoneoarai@gmail.com",
  "description": "Minimize tab groups after 30s of inactivity. Active tab groups stay open.",
  "version": "0.2.3",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabGroups",
    "storage"
  ],
  "icons": {
    "128": "icon.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Auto Minimize Tab Groups Settings"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "auto-minimize-tab-groups@yoneoarai.com",
      "strict_min_version": "109.0"
    }
  },
  "homepage_url": "https://github.com/yoneoarai/auto-minimize-tab-groups"
}