Just so you know, the extension explicitly checks that it’s running on Windows and calls native code (probably in iCloud for Windows) to work.Unless your software directly interfaces with hardware, like a video card or printer the OS shelters your software from the hardware. Windows programmers for the most part never worry about the hardware.
we have no idea why they pulled this browser extension. It could be a back end issue like iCloud. Also I would bet this extension to a Chromium browser is universal to all platforms and not written specifically for Windows.