Responsive Design Tester

Helps users test website responsiveness across various devices and screen sizes to ensure optimal user experience.

Responsive Design Tester is available to install from Firefox Browser Add-ons and for download from this page. It has 13 active users The latest version is 1.0, and it was published 2 months ago.

Install from Firefox Browser Add-ons

View source code

Total download count: 0 (Only count downloads from Firefox-Stats)

All available versions

You can find the current and older versions of Responsive Design Tester here. You can download the archived versions or inspect their source codes.

As a free user, you can only download the latest version.

Upgrade to download older versions

1 versions available for download.

How to install Responsive Design Tester from an XPI file

Simply drag-and-drop the XPI into Firefox to install the add-on.

How to install Responsive Design Tester from a ZIP file

Download the Responsive Design Tester ZIP file
In Firefox browser, go to about:addons to open Add-ons Manager
Click on , then select Install Add-on From File
Select the Responsive Design Tester ZIP file from step 1. Responsive Design Tester is now installed on your browser.