If you want to add an Internet Explorer mode button on the Edge toolbar, here is how you can do that. You do not need third-party extensions since Edge includes an in-built option for this purpose.

Alongside the long list of enhancements and features, starting with the Windows 10 October 2018 Update (version 1809), Microsoft Edge now allows you to add ... action buttons in the toolbar.

5 Microsoft Edge add ... and click the Get button. Click the button to Add Extension (Figure B). An icon for the extension that allows you to control it should appear on the toolbar.

Microsoft's new Edge browser is sleek and minimalist -- so minimalist that it no longer features a home button on the default toolbar. For many users, this probably isn't an issue -- I don't know ...