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Posts Tagged ‘ Firefox resolution test ’

How to test different resolutions – Part two – Firefox resolutions testing

Continuing from the last months Chrome resolution testing, we are going to test tools from Firefox. None of the tools listed simulate mobile devices. So for mobile testing the mobile web address will have to be manually used, as the browser won’t be recognized as a mobile device. Unfortunately this will not work with every site, and even on sites that work, some pages may not be displayed correctly.


This add-on uses the Add-on bar at the bottom of the Firefox window. Unfortunately this feature was removed in Firefox version 29+, so an additional add-on is required to make it work ( After installing the add-on bar it will appear at the bottom of the screen, from where the FireSizer can be used. The FireSizer will be located in the bottom right of the screen. It will show only as the current window resolution, right clicking the displayed resolution shows additional options. You can select from existing presets, or add you own. You can also save the current window size. This add-on doesn’t resize only the HTML area (viewport), but takes into account window borders, top/bottom status bars, menus, navigation buttons, etc. This isn’t so good for mobile testing, but makes more sense for desktop testing.