diff --git a/nixosModules/apps/firefox/default.nix b/nixosModules/apps/firefox/default.nix
index 14aeb6c2..c157ce47 100644
--- a/nixosModules/apps/firefox/default.nix
+++ b/nixosModules/apps/firefox/default.nix
@@ -87,6 +87,7 @@
         Preferences = {
           "browser.aboutConfig.showWarning" = false;
           "browser.bookmarks.addedImportButton" = false;
+          "browser.tabs.inTitlebar" = 0;
           "datareporting.healthreport.uploadEnabled" = false;
           "datareporting.policy.dataSubmissionPolicyAccepted" = true;
           "dom.security.https_only_mode" = true;