--- vendor/github.com/wailsapp/wails/v2/internal/frontend/desktop/linux/window.c
+++ vendor/github.com/wailsapp/wails/v2/internal/frontend/desktop/linux/window.c
@@ -329,6 +329,24 @@
     if (event->button == 3)
     {
         return FALSE;
+    }
+
+    // Handle mouse back/forward buttons (GDK button 8 = Back, button 9 = Forward)
+    // WebKitGTK doesn't propagate these correctly to DOM, so we dispatch custom events
+    // that the frontend can listen to for history navigation.
+    if (event->button == 8)
+    {
+        webkit_web_view_run_javascript(WEBKIT_WEB_VIEW(widget),
+            "window.dispatchEvent(new CustomEvent('verstak:navigate-back'));",
+            NULL, NULL, NULL);
+        return TRUE;
+    }
+    if (event->button == 9)
+    {
+        webkit_web_view_run_javascript(WEBKIT_WEB_VIEW(widget),
+            "window.dispatchEvent(new CustomEvent('verstak:navigate-forward'));",
+            NULL, NULL, NULL);
+        return TRUE;
     }
 
     if (event->type == GDK_BUTTON_PRESS && event->button == 1)