From f8679f6b8ccd66394c2f178b0960070f5893d29c Mon Sep 17 00:00:00 2001
From: Alexandr Stelnykovych <stenya@gmail.com>
Date: Thu, 2 Oct 2025 17:53:42 +0300
Subject: [PATCH] fix[desktop:Tauri]: block navigation to blank page

https://github.com/safing/portmaster/issues/2023
---
 desktop/tauri/src-tauri/src/window.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/desktop/tauri/src-tauri/src/window.rs b/desktop/tauri/src-tauri/src/window.rs
index c789a97d..ca817dcd 100644
--- a/desktop/tauri/src-tauri/src/window.rs
+++ b/desktop/tauri/src-tauri/src/window.rs
@@ -42,6 +42,14 @@ pub fn create_main_window(app: &AppHandle) -> Result<WebviewWindow> {
                 debug!("[tauri] main window page loaded: {}", _event.url());
                 do_after_main_window_created(); // required operations after Main window creation
             })
+            .on_navigation(|url| {
+                debug!("[tauri] main window navigation event: {}", url);
+                if url.as_str() == "about:blank" {
+                    debug!("[tauri] blocking navigation to about:blank");
+                    return false;
+                }
+                return true;
+            })
             .build();
 
         match res {