diff --git a/home/misterio/features/desktop/common/firefox.nix b/home/misterio/features/desktop/common/firefox.nix
index fc0df6a1..695746c4 100644
--- a/home/misterio/features/desktop/common/firefox.nix
+++ b/home/misterio/features/desktop/common/firefox.nix
@@ -32,7 +32,11 @@ in
   };
 
   home = {
-    sessionVariables.BROWSER = "firefox";
+    sessionVariables = {
+      BROWSER = "firefox";
+      # https://github.com/NixOS/nixpkgs/issues/238025
+      TZ = "/etc/localtime";
+    };
     persistence = {
       # Not persisting is safer
       # "/persist/home/misterio".directories = [ ".mozilla/firefox" ];