To enable Edge’s Internet Explorer compatibility mode: Although it’s not a genuine replacement for Internet Explorer, it’s good enough to access those types of websites. That’s why Edge comes with a semi-hidden Internet Explorer compatibility layer. Sites and apps that could be crucial for your line of work or at the heart of a company’s Intranet. Microsoft knows that Internet Explorer’s disappearance can break some sites and apps. Time to Say Goodbye? Windows 11 users: use IE Mode in Edge Browser
