How to Use Firefox for Mobile and Responsive Web Design

Today I found a nice trick that I wish I would of realized years ago. I figured I’d post it here in case anyone else is missing out on this great Firefox feature for mobile developers and responsive web design. Firefox as a mobile screen display which you can get by using the shortcut:


It’s that easy.

To use this feature of Firefox, simply open the browser, hit the key combo, control+shift+m and type in any web address in the address bar like normal. Here’s what it looks like:

Snap 2014-11-20 at 21.39.23…and what’s really nice is that you can use developer tools while at this size and be able to read them easily with little scrolling. I used to try to use the tools while the browser window was very small and I couldn’t read more than a line at a time but now it is easy. Here’s a picture of the same website as above with developer tools opened:

Snap 2014-11-20 at 21.39.45Nice huh? By the way, there is an icon in the top right corner of the tools window that allows you to reposition the toolbox in the side of the window instead of at the bottom as it is by default.

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