diff --git a/overlays/nixpak/firefox.nix b/overlays/nixpak/firefox.nix
index b3448d3..3156280 100644
--- a/overlays/nixpak/firefox.nix
+++ b/overlays/nixpak/firefox.nix
@@ -76,7 +76,7 @@
     };
   in
     prev.wrapFirefox sandboxed-firefox-esr.config.env {
-      browserName = "firefox";
+      applicationName = "firefox";
       pname = "firefox-esr-sandboxed";
       desktopName = "Firefox ESR (Sandboxed)";