1 files changed, 1 insertions, 1 deletions
diff --git a/services/sync/tps/extensions/tps/resource/modules/windows.sys.mjs b/services/sync/tps/extensions/tps/resource/modules/windows.sys.mjs
index b0798b9031..22c2f47ec9 100644
--- a/services/sync/tps/extensions/tps/resource/modules/windows.sys.mjs
+++ b/services/sync/tps/extensions/tps/resource/modules/windows.sys.mjs
@@ -16,7 +16,7 @@ export var BrowserWindows = {
    * @param aPrivate The private option.
    * @return nothing
    */
-  Add(aPrivate, fn) {
+  Add(aPrivate) {
     return new Promise(resolve => {
       let mainWindow = Services.wm.getMostRecentWindow("navigator:browser");
       let win = mainWindow.OpenBrowserWindow({ private: aPrivate });