[anonymfus]

Pre-Chromium Microsoft Edge did until August 2019.

https://www.windowscentral.com/microsoft-edge-will-no-longer... (link found via Wikipedia article on "Microsoft Edge Legacy")

[WorldMaker]

The Edge team also briefly had a standalone Windows 8/10 app called "Reader" that supported EPUB, PDF, and a couple other similar formats without the rest of the browser UI, but was just purely an embed of Edge (Spartan).