shell-things/rc/xprofile

# fcitx as input method requires these three
export XMODIFIERS=@im=fcitx
export GTK_IM_MODULE="fcitx"
export QT_IM_MODULE="fcitx"

# required for using qt5ct (QT5 qtconfig), theming
export QT_QPA_PLATFORMTHEME="qt5ct"

# This is hopefully read by web browsers and thus sites with dark theme
# should offer it to me
#export GTK_THEME=Adwaita-dark