Examine source code of Smart Tab Switcher

{
  "manifest_version": 3,
  "name": "Smart Tab Switcher",
  "version": "1.6.0",
  "description": "Fast tab switching and management with fuzzy search and keyboard shortcuts",
  "permissions": [
    "tabs",
    "bookmarks",
    "alarms",
    "storage"
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+T",
        "mac": "Command+Shift+K"
      },
      "description": "Open quick switcher"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/extension/icon-16.png",
      "32": "icons/extension/icon-32.png",
      "48": "icons/extension/icon-48.png",
      "128": "icons/extension/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/extension/icon-16.png",
    "32": "icons/extension/icon-32.png",
    "48": "icons/extension/icon-48.png",
    "128": "icons/extension/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "smart-tab-switcher@kevinma2010.com",
      "strict_min_version": "109.0"
    }
  }
}