diff --git a/dotfiles/zshrc b/dotfiles/zshrc
index 326b230..552ad92 100644
--- a/dotfiles/zshrc
+++ b/dotfiles/zshrc
@@ -48,7 +48,8 @@ if [[ "$OSTYPE" =~ ^linux.*$ ]]; then
     # Signal to xdg-desktop-portal that we're on Sway
     export XDG_CURRENT_DESKTOP=sway
     # 2022-12-26: use Vulkan renderer in Sway
-    export WLR_RENDERER=vulkan
+    # 2023-01-03: a bit buggy on older Intel, especially in Thunderbird (even on new Intel)
+    #export WLR_RENDERER=vulkan
     {%@@ endif @@%}
 fi