Hey, I‘m using KDE and had that problem, too. I rather by chance changed something in the window rules for firefox and voilà, the window reappeared when starting firefox! So I‘m happy now. Hope this will help you too.
Hey,
I‘m using KDE and had that problem, too. I rather by chance changed something in the window rules for firefox and voilà, the window reappeared when starting firefox! So I‘m happy now. Hope this will help you too.