Doom Emac swallowing Firefox running windows

Firefox application automatically disappearing (just disappearing )when i opening Doom Emacs while one or more firefox windows already running in the background (in any workspace).
for example if I opened firefox application and then Doom Emacs in same workspace, only Doom Emacs existing.But whenever i close Doom Emacs , the previous disappeared firefox application coming back to same workspace.

My workflow doesn’t play with a tiling wm - so this is just a thought - i3 is tiling vm and and - most likely - a configuration tells the system to fullscreen the app in question.