Does Sumatra support reading Amazon's books direct, or do you need to pass them through DeDRM first? Or is there some other store selling DRM-free epubs I'm not

Does Sumatra support reading Amazon's books direct, or do you need to pass them through DeDRM first? Or is there some other store selling DRM-free epubs I'm not aware of? I end up stripping DRM off mine with Calibre's tools, then reading them on calibre-web.