diff --git a/src/slic3r/GUI/WebDialog.cpp b/src/slic3r/GUI/WebDialog.cpp
index 509ccefdee..97ea52677e 100644
--- a/src/slic3r/GUI/WebDialog.cpp
+++ b/src/slic3r/GUI/WebDialog.cpp
@@ -13,6 +13,10 @@
 #include <wx/gdicmn.h>
 #include <wx/webview.h>
 
+#ifdef __WXGTK__
+#include <gtk/gtk.h>
+#endif
+
 namespace Slic3r { namespace GUI {
 
 WebDialog::WebDialog(wxWindow*          parent,
@@ -52,6 +56,17 @@ WebDialog::WebDialog(wxWindow*          parent,
     Bind(wxEVT_CLOSE_WINDOW, &WebDialog::on_close_window, this);
 }
 
+void WebDialog::use_normal_window_type()
+{
+#ifdef __WXGTK__
+    // wxGTK types every wxDialog as a dialog, and Mutter offers no maximize for anything but a
+    // normal window. Mutter also stops hiding a normal window from the taskbar, so keep it hidden
+    // as a dialog with a parent is everywhere else.
+    gtk_window_set_type_hint(GTK_WINDOW(m_widget), GDK_WINDOW_TYPE_HINT_NORMAL);
+    gtk_window_set_skip_taskbar_hint(GTK_WINDOW(m_widget), TRUE);
+#endif
+}
+
 void WebDialog::add_user_scripts()
 {
     if (wxWebView* wv = browser()) {
diff --git a/src/slic3r/GUI/WebDialog.hpp b/src/slic3r/GUI/WebDialog.hpp
index e1cfda0701..650259c2b0 100644
--- a/src/slic3r/GUI/WebDialog.hpp
+++ b/src/slic3r/GUI/WebDialog.hpp
@@ -62,6 +62,10 @@ public:
 
     bool is_open() const { return m_open; }
 
+    // Lets a modeless window be maximized on X11; call before Show(). Modal ones stay dialogs so the
+    // window manager keeps routing focus from the parent to them.
+    void use_normal_window_type();
+
     // The payload submitted via window.orca.submit() (modal use), if any.
     const std::optional<nlohmann::json>& result() const { return m_result; }
 
diff --git a/src/slic3r/plugin/host/PluginHostUi.cpp b/src/slic3r/plugin/host/PluginHostUi.cpp
index 84988b2dff..15fe24b2c5 100644
--- a/src/slic3r/plugin/host/PluginHostUi.cpp
+++ b/src/slic3r/plugin/host/PluginHostUi.cpp
@@ -399,6 +399,7 @@ py::object ui_create_window(const std::string& html, const std::string& title, i
             if (UiRegistry::instance().is_open(new_id))
                 dlg->Destroy();
         } else {
+            dlg->use_normal_window_type();
             dlg->Show();
         }
     });