IE and Edge have this "feature" that makes sure that all pages have a minimum width of 1024 pixels. This is meant to avoid bugs in pages not prepared for narrow screens. Unfortunately this scales all our UI elements. This can be disabled by adding "@-ms-viewport { width: device-width; }" to the CSS: https://msdn.microsoft.com/library/hh708740(v=vs.85).aspx
Needs to be retested with the new Edge browser.
This is still an issue in new Edge browser. Tested new Edge (Version 95.0) on Windows 10 on a narrow screen Lamina tablet. I saw this by running xterm in the session, the font should be aliased and all pixels should be black. In Edge, the font is slightly blurred. In Chrome on the same device, the xterm font is sharp.