Running Microsoft Edge browser and Internet Explorer side-by-side makes little sense. If you rarely use the Internet Explorer browser, a better option would be to uninstall or turn off the browser ...
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.
In brief: Microsoft is once again warning the few organizations and people who still use Internet Explorer that the browser is going away permanently in a few months. However, the ancient software ...