diff --git a/src/Ui/UiServer.py b/src/Ui/UiServer.py
index 9d93ccfd..63738c99 100644
--- a/src/Ui/UiServer.py
+++ b/src/Ui/UiServer.py
@@ -147,13 +147,17 @@ class UiServer:
         if config.open_browser and config.open_browser != "False":
             logging.info("Opening browser: %s...", config.open_browser)
             import webbrowser
+            ui_ip = config.ui_ip if config.ui_ip != "*" else "127.0.0.1"
+            url = f'http://{ui_ip}:{config.ui_port}/{config.homepage}'
             try:
                 if config.open_browser == "default_browser":
                     browser = webbrowser.get()
                 else:
                     browser = webbrowser.get(config.open_browser)
-                url = "http://%s:%s/%s" % (config.ui_ip if config.ui_ip != "*" else "127.0.0.1", config.ui_port, config.homepage)
                 gevent.spawn_later(0.3, browser.open, url, new=2)
+            except webbrowser.Error as err:
+                import subprocess
+                subprocess.Popen([config.open_browser, url])
             except Exception as err:
                 print("Error starting browser: %s" % err)