diff --git a/modules/applications/firefox.nix b/modules/applications/firefox.nix
index 4d18594..eb39b8e 100644
--- a/modules/applications/firefox.nix
+++ b/modules/applications/firefox.nix
@@ -33,6 +33,7 @@
           settings = {
             "browser.aboutConfig.showWarning" = false;
             "browser.warnOnQuit" = false;
+            "browser.quitShortcut.disabled" = true;
             "browser.theme.dark-private-windows" = true;
             "browser.toolbars.bookmarks.visibility" = "newtab";
             "browser.startup.page" = 3; # Restore previous session