Fix NS_BINDING_ABORTED in Firefox

Author: ksy36

tests/e2e/page_objects/base.py

@@ -12,4 +12,6 @@ def __init__(self, page, live_server):
 
     def navigate(self):
         """Navigate to this page's URL."""
+        if self.page.url != "about:blank":
+            self.page.wait_for_load_state("networkidle")
         self.page.goto(f"{self.live_server.url}{self.url}")