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+# `EDITOR`

+for EDITOR in 'vim' 'nvim' 'vi' 'nano'

+do

+  [ "$(command -v "$EDITOR")" ] || continue

+  export EDITOR && break

+done

+

+# `TERMINAL`

+for TERMINAL in 'xfce4-terminal' 'gnome-terminal' 'xterm' 'x-terminal-emulator'

+do

+  [ "$(command -v "$TERMINAL")" ] || continue

+  export TERMINAL && break

+done

+

+# `BROWSER`

+for BROWSER in 'firefox' 'chromium-browser' 'x-www-browser'

+do

+  [ "$(command -v "$BROWSER")" ] || continue

+  export BROWSER && break

+done