QA/Responsive Design Mode

Intro

Responsive Design Mode is currently enabled starting with Firefox 52.

The tool is convenient because you can quickly and precisely change the size of the content area.

Of course, you could just resize the browser window, but making the browser window smaller makes all your other tabs smaller too, and can make the browser's interface much harder to use.

While Responsive Design Mode is enabled, you can continue browsing as you normally would in the resized content area.

Feature Ownership

QA Lead: Mihai Boldan, :mboldan on IRC

Product Manager: Marco Mucci, :MarcoM on IRC

Developer contacts: J. Ryan Stinnett , :jryans on IRC and Matteo Ferretti , :zer0 or :matteo on IRC

Enabling the feature

• Enabled by default in Nightly:
  • Build from 2016-10-01 bug 1296498

Go to about:config

   devtools.responsive.html.enabled

and the value:

   true