Device Screen Tester

Experience website designs on different mobile screens by emulating various devices, providing valuable insights into mobile compatibility and aesthetics.

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Device Screen Tester is available to install from Firefox Browser Add-ons and for download from this page. It has 1 active users The latest version is 1.0, and it was published 8 months ago.

All available versions

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

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

How to install Device Screen Tester from an XPI file

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

How to install Device Screen Tester from a ZIP file

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