Responsivfy Helper is a free Chrome extension developed by Ngoc Tran. It falls under the category of Browsers and the subcategory of Add-ons & Tools. This extension enables advanced features within Responsivfy.com, allowing users to have a more enhanced experience.

With Responsivfy Helper installed, users can enjoy the following features while using Responsivfy.com:

1. Sync Responsive Previews: This feature allows users to synchronize responsive previews across multiple devices, making it easier to test and optimize website responsiveness.

2. Unblock Restricted Websites: Responsivfy Helper unblocks previewing of websites that have restricted access due to the X-Frame-Options header. This enables users to view and analyze the responsive design of any website, regardless of the restrictions in place.

Overall, Responsivfy Helper is a valuable extension for users who frequently use Responsivfy.com and want to take advantage of advanced features. It enhances the functionality of the platform and provides a seamless experience for testing website responsiveness.