In 2020, the relevance of testing on Internet Explorer (IE) for web developers and testers is increasingly questioned due to its declining market share and Microsoft's shift towards promoting the Edge browser. Internet Explorer, once dominant, has seen a significant decline as modern browsers like Google Chrome gained popularity, and Microsoft itself has advised moving away from IE. Despite this, some enterprises continue to rely on IE for legacy business tools and compliance reasons, particularly in sectors such as healthcare and government. Microsoft Edge, introduced in 2015 and later transitioning to a Chromium-based platform, aims to recapture market share, although it faces challenges in gaining traction. Testing IE on macOS remains a challenge, but solutions such as online cross-browser testing tools and virtual machines exist. While IE is fading, it still has a presence in certain environments, and the development community shows mixed feelings about its role in browser compatibility testing.