Examine source code of TabRenamerFX

{
  "manifest_version": 3,
  "name": "Tab Renamer",
  "version": "1.2.0",
  "description": "Rename a tab (tab-only) or persistently rename a URL by overriding document.title.",
  "permissions": [
    "storage",
    "tabs",
    "scripting",
    "contextMenus"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Tab Renamer",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7a8d9b2c-0e75-4f10-9b3b-8f9b8b7cc3c1}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}