diff --git a/toolkit/modules/ShortcutUtils.sys.mjs b/toolkit/modules/ShortcutUtils.sys.mjs
index e45855602bb2a..6e2162493f6c5 100644
--- a/toolkit/modules/ShortcutUtils.sys.mjs
+++ b/toolkit/modules/ShortcutUtils.sys.mjs
@@ -226,7 +226,7 @@ export var ShortcutUtils = {
     const MEDIA_KEYS =
       /^(MediaNextTrack|MediaPlayPause|MediaPrevTrack|MediaStop)$/;
     const BASIC_KEYS =
-      /^([A-Z0-9]|Comma|Period|Home|End|PageUp|PageDown|Space|Insert|Delete|Up|Down|Left|Right)$/;
+      /^([A-Z0-9]|Comma|Period|Home|End|PageUp|PageDown|Space|Insert|Delete|Up|Down|Left|Right|Tab)$/;
     const FUNCTION_KEYS = /^(F[1-9]|F1[0-2])$/;
 
     if (MEDIA_KEYS.test(string.trim())) {