With this extension, you're able to change the browser window size to be able to emulate various resolutions.
This is particularly useful for web designers and developers by helping them test their layouts on different resolutions. The list of available resolutions is completely customizable – you can add/delete or re-order your own as needed.
You can set the window's width/height, position, preset icon (phone, tablet, laptop and desktop) and even the option to apply the new dimensions just to the viewport. You can also apply a custom resolution instantly with a keyboard shortcut that is configurable in the options panel. These all make it much easier for designers, developers and QAs alike who need an easy way to simulate various browser sizes for testing purposes!