Also firefox for windows can not be closed by esc button.

puppygamer1994 said

when i insert samsung note 8 into samsung dex and i click on firefox icon, the app will not launch.

Enable Developer Mode and it allows all applications automatically.

Go to settings -> Samsung Dex -> About Samsung Dex Click the Samsung Dex logo 8 times. Then launch Firefox.

But i just installed app from google store. i did nothing. Please fix the app.