alt Hacker NewsAn earlier company I worked at had this same issue with Internet Explorer. It was after IE had been deprecated by microsoft as a browser but our IT department still had it as a downloadable application. Most of my team's on-call issues were from internal users using IE to access our site, even after we added an IE compatible popup that would tell them NOT to use IE.
Chrome, or Firefox are third party browsers to the operating system.
The internet explorer/edge issues were due to a web browser that was built into the operating system, and owned by the operating system company (Microsoft in this case).
There was a popular trend for a while that IE was the windows feature that let you download a different browser.
Apple had a similar run with Safari and from what I recall had to change.