Hi johan.ek62, please ignore the spam message promoting an unofficial phone number.

johan.ek62 said

My Firefox windows is following over to all my desktops.

Please explain the problem in detail. What happens? What are the exact error message(s) ?

I don't get any error messages. On Mac you can swipe right or left to change desks and normally have different windows open on the desks 1,2,3. But now is it not possible with Firefox. all other applications its no problem. I hope this clear the problem I have.

The windows from Desk 1 is copy to Desk 2 and 3 with Firefox but not with the others applications.

I called for more help.

Yes please.

I can send you a short video so you can se the problem if you whant.

Do you have Firefox in fullscreen, perhaps'?

Thank you for your tips but I have three windows open att the same time.

This problem is only on Mac where you can have multiple desks. Her is same examples on the pictures I have attached. As you can see the Firefox windows is follows with over to all desks.