diff --git a/hosts/neodymium/configuration.nix b/hosts/neodymium/configuration.nix
index 9b54df6..c44c571 100644
--- a/hosts/neodymium/configuration.nix
+++ b/hosts/neodymium/configuration.nix
@@ -211,6 +211,7 @@ in
         "privacy.clearOnShutdown.downloads" = false;
         "privacy.donottrackheader.enabled" = true;
         "general.autoScroll" = true;
+        "pdfjs.viewerCssTheme" = 2;
       };
     };