Microsoft Edge offers F12 tool features that are unique from any other developer tools. Edit HTML and CSS in the browser, making changes on the fly, and Change Bars will highlight any changes you have made. The Changes tab will show all your changes in one place with the ability to revert or copy and add updates into your source code. Speed up your workflow by using the F12 tools! Find more features unique to Microsoft Edge F12 and tips for using the tools on the EdgeDevTools twitter page, or if you would like to request a new feature for the Microsoft Edge F12 tools, visit UserVoice.