diff --git a/stackstac/show.py b/stackstac/show.py
index b994f5b..80d1bca 100644
--- a/stackstac/show.py
+++ b/stackstac/show.py
@@ -629,7 +629,7 @@ def layers_changed(self, change: dict):
     def base_url_from_window_location(url: str) -> Optional[str]:
         if not url:
             return None
-        if path_re := re.match(r"(^.+)\/(?:lab|notebook|voila)", url):
+        if path_re := re.match(r"(^.+?)\/(?:lab|notebook|voila)", url):
             return path_re.group(1)
         return None