From fc0605cedf38ea92a95aef0ec501ab49c23f28cc Mon Sep 17 00:00:00 2001
From: Aaron Dodson <aaron.dodson@raspberrypi.org>
Date: Mon, 18 May 2026 11:22:51 -0700
Subject: [PATCH] fix: Don't open the devtools in Firefox when toggling
 screenreader mode

---
 packages/blockly/core/shortcut_items.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/blockly/core/shortcut_items.ts b/packages/blockly/core/shortcut_items.ts
index cf3bff0e0d1..0db2ce0fce5 100644
--- a/packages/blockly/core/shortcut_items.ts
+++ b/packages/blockly/core/shortcut_items.ts
@@ -1269,7 +1269,7 @@ export function registerToggleScreenreaderMode() {
   const toggleScreenreader: KeyboardShortcut = {
     name: names.TOGGLE_SCREENREADER,
     preconditionFn: () => true,
-    callback: (workspace) => {
+    callback: (workspace, e) => {
       enabled = !enabled;
       keyboardNavigationController.setScopeChangeAudioCuesEnabled(enabled);
       workspace.getNavigator().setNavigationLoops(!enabled);
@@ -1280,6 +1280,7 @@ export function registerToggleScreenreaderMode() {
         .getNavigator()
         .setNavigationLoops(!enabled);
       showScreenreaderModeHint(workspace, enabled);
+      e.preventDefault();
       return true;
     },
     keyCodes: [shortcut],