Thank you so much for your feedback! Yes, this is indeed a known issue, and I completely understand your frustration. I’ve actually spent a lot of time trying to figure out a solution for this, but unfortunately, it is a strict limitation of the browser's API.

The extension works by using the only viable method to make workspaces seamless: when you switch workspaces, any tabs not linked to the current one are simply hidden (browser.tabs.hide). However, the browser currently does not allow extensions to hide or manage Tab Groups in the same way. We can hide the tabs inside the group, but the group header itself cannot be hidden.

Until the Firefox developers add API support for hiding tab groups, we cannot fully integrate them. I'm keeping a close eye on their updates, and I will implement this the exact moment they make it technically possible!