For those that run linux and want to update their Firefox icon so it automatically launches with GTK_THEME="Adwaita:light" firefox %u instead (band-aid work around that shouldn't need to be).
$ cp /usr/share/applications/firefox.desktop ~/.local/share/applications $ gedit ~/.local/share/applications/firefox.desktop
Change the "Exec=" line to read:
Exec=bash -c "GTK_THEME=\"Adwaita:light\" firefox %u &"
Save and Exit. Now your Firefox icon should start using the Adwaita:light theme without a lingering terminal window.
For those that run linux and want to update their Firefox icon so it automatically launches with GTK_THEME= "Adwaita: light" firefox %u instead (band-aid work around that shouldn't need to be).
$ cp /usr/share/ applications/ firefox. desktop ~/.local/ share/applicati ons share/applicati ons/firefox. desktop
$ gedit ~/.local/
Change the "Exec=" line to read:
Exec=bash -c "GTK_THEME= \"Adwaita: light\" firefox %u &"
Save and Exit.
Now your Firefox icon should start using the Adwaita:light theme without a lingering terminal window.