Examine source code of Auto Collapse Tab Groups

{
  "manifest_version": 3,
  "name": "Auto Collapse Tab Groups",
  "version": "1.0",
  "description": "Automatically collapses unfocused tab groups when switching to a tab outside the group",
  "permissions": [
    "tabs",
    "tabGroups"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "auto-collapse-groups@example.com",
      "strict_min_version": "139.0"
    }
  },
  "icons": {
    "48": "icon.png",
    "96": "icon.png"
  }
}