Name of the selected device - A drop-down list that includes whatever devices you have selected from the Device Settings screen. From left to right, the display includes: Information for the selected device is centered over the display. The device you select when in Responsive Design Mode and the orientation (portrait or landscape) is saved between sessions. With Responsive Design Mode enabled, the content area for web pages is set to the screen size for a mobile device. There are three ways to toggle Responsive Design Mode:įrom the Firefox menu: Select Responsive Design Mode from the Browser Tools submenu in the Firefox Menu (or Tools menu if you display the menu bar or are on macOS).įrom the Developer Tools toolbox: Press the Responsive Design Mode button in the Toolbox’s toolbarįrom the keyboard: Press Ctrl + Shift + M (or Cmd + Opt + M on macOS). Responsive Design Mode gives you a simple way to simulate these factors, to test how your website will look and behave on different devices. The most obvious factor here is screen size, but there are other factors as well, including the pixel density of the display and whether it supports touch. Responsive design is the practice of designing a website so it looks and works properly on a range of different devices - particularly mobile phones and tablets as well as desktops and laptops. Turning on Firefox tests for a new configuration.Getting Set Up To Work On The Firefox Codebase.
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