Each simulator is useful to test things that require OS integration, such as form input with virtual keyboards. Device emulators and simulatorsĭevice simulators and emulators simulate not just the browser environment but the entire device. Use IE 11 Emulation to simulate how your page might look in older versions of Internet Explorer. To emulate Windows Phones, use the Microsoft Edge (EdgeHTML) built-in emulation. Firefox Responsive Design Viewįirefox has a responsive design view that encourages you to stop thinking in terms of specific devices and instead explore how your design changes at common screen sizes, or on your own screen size by dragging the edges of the window. Test your site on browsers running on real devices, to be certain everything behaves as expected. But a browser emulator doesn't emulate differences in API, CSS support, and certain behaviors that manifest only on a mobile browser on an actual device.