diff --git a/conf/i3/config b/conf/i3/config
index e7ed0be2..55e30797 100644
--- a/conf/i3/config
+++ b/conf/i3/config
@@ -17,6 +17,8 @@
 #
 # Debian theming: lxappearance gtk-chtheme qt4-qtconfig qt5ct
 # https://askubuntu.com/a/600946
+# + ~/.xprofile specifies GTK_THEME which hopefully gets detected/understood
+#   by browsers etc.
 #
 # YES! This file is a monster and there really are that many weird
 # packages and three electrons autostarting, SEND HELP!
diff --git a/rc/xprofile b/rc/xprofile
index cce544e1..d651723d 100644
--- a/rc/xprofile
+++ b/rc/xprofile
@@ -2,3 +2,4 @@ export XMODIFIERS=@im=fcitx
 export GTK_IM_MODULE="fcitx"
 export QT_IM_MODULE="fcitx"
 export QT_QPA_PLATFORMTHEME="qt5ct"
+GTK_THEME=Adwaita-dark