manifest.json

{
  "manifest_version": 3,
  "name": "Chrome Show Tab Numbers",
  "version": "1.6.0",
  "description": "A Chromium extension to show tab numbers.",
  "icons": {
    "128": "assets/icon128.png"
  },
  "background": {
    "service_worker": "background.js"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "permissions": ["contextMenus", "scripting", "storage", "tabGroups", "tabs"],
  "host_permissions": ["<all_urls>"],
  "commands": {
    "toggle-all-tabs": {
      "description": "Toggle tab numbering for all tabs"
    },
    "toggle-current-tab": {
      "description": "Toggle tab numbering for current tab"
    }
  }
}