The top right of the dev tools, or from the Developer Toolbar with the When in Responsive Design mode you can click a little button at the top right of the preview to capture a screenshot of how your site looks on a particular device.Īctivate the screenshot tool from the main toolbar in Firefox 57 (nightly), from In normal mode you can use the screenshot tool to capture a drag-to-define area, or you can click on individual page elements to capture them. Screenshot Toolįirefox has a super handy screenshot tool in built no need for any more screen capture extensions. You can specify the format you want your color code to be given in, or have it use the authored format.Īctivate from the Web Developer menu, or in the Developer Toolbar enter the command eyedropper. EyedropperĮasily grab any color from a page with the eyedropper, which will magnify whatever you hover over with your mouse to make color picking easier. Keep an eye on the dimensions of your designs by using page rulers, similar to those you’d find in a graphic design application.Ĭlick the Rulers icon on the top bar of the dev tools to activate, or in the Developer Toolbar enter the command rulers. Or, in the Developer Toolbar, enter resize on to activate this mode, resize to to test a specific size, resize off to turn it off again, or resize toggle to toggle it off and on. To activate it click the Responsive Design Mode icon in the dev tools. You can choose from a list of predefined dimensions, add your own size definitions to the list, or freely resize the preview. Responsive Design Mode helps you simulate different devices their dimensions, interaction methods and typical connection speed. Hit SHIFT + F2 to open the toolbar, then enter the command help to learn about all the commands you have at your disposal. For example, you can use it to take a quick screenshot, to get a responsive preview of your site in specific dimensions, or to grab a color from the page. It’s a relatively simple command line interface through which you can interact with just about everything dev tools can do. The Developer Toolbar is a very handy way to quickly activate and control the features included in Firefox’s dev tools. So if you’re into CSS animation, stay tuned! The way animations are pictured in the dev tools also helps you determine the make up of each animation, something we’ll go into in more depth in another article coming up very soon. With an animation selected you can modify its properties in the Styles tab and see the effect of your changes in real time, a feature that is very helpful for the process of tweaking things like easing functions. For each animated element, it shows you a timeline with a scrubber you can control, and gives you the ability to pause, speed up or slow down animations. CSS Animation Inspectorįirefox dev tools now include an in-depth CSS Animation inspector that will automatically detect animations on a selected element, as well as any animations on its child elements. If you’ve yet to play with CSS Grid you’re going to love it, and the process of working with it is made all the more smooth with Firefox’s grid inspector tools. Visualize the effects of transforms applied to the grid container.Give you an overlay showing how a grid is laid out.Introducing the new Layout Panel for the CSS Grid InspectorĪmong other things, the grid inspector can: As far as I know, at present the only inspector for CSS Grid is found in Firefox’s dev tools. CSS Grid InspectorĬSS Grid is beginning to radically change how web design layouts are made, and for the better. Note: a couple of the newest features need Firefox Nightly, but most are available now in regular Firefox. ![]() If it’s been a while since you used Firefox for development too, check out these features in Firefox Dev Tools you might not know about. They are now definitely on the same level as any other dev tools and boast some fantastic features, including a few you won’t find anywhere else at present. On my return I found things have changed!įirefox’s own dev tools have come a long way, and they are still being continually upgraded. Firefox did have some in built tools, but at the time they weren’t as strong as Firebug or Chrome’s dev tools. When I had last used Firefox in earnest, working with dev tools was all about the Firebug extension. ![]() ![]() I recently decided to switch back to Firefox, having been a Chrome user for a number of years.
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