I can assure you that this is the case. However, since I use my workstation for work, I cannot reinstall an app with compatibility issues. I don't have the time to do so, but Windows Blinds does not work correctly with Firefox if it's part of Windows 10 version 1909. I can't speak for other versions of Windows. Also, I am using Windows Pro, which occasionally has different issues than the Home version of Windows.
Interestingly, Curtains were not part of the Object Desktop package installer when I was installing the OD apps. It took two days for it to show up for me. I didn't know it exists! After trying Curtains, it does not cause any of the issues with Firefox and works much better than Windows Blinds in general.
The Curtains app does, however, have several small bugs. For example, it turns off auto-refreshing in Explorer much of the time.
What I mean by this is that the desktop or folders do not automatically update, and you have to hit F5 to see files to folders that are new to the desktop or Explorer.
Here's an image of the Chrome tab in the taskbar with the Drive link. The tab in the taskbar does not update and freezes on a browser tab. In this case, it's locking on the time-tracking app https://www.toggl.com/ that runs a timer in the browser tab. So it may be only for tabs with text that changes. Regardless, Curtains should not freeze the taskbar like this.
If you need info on these bugs in Curtains, please let me know what I may provide to help.