Log browser context at start of failing test

Author: agg23

tests/sync/test_queryselector.py

@@ -39,7 +39,7 @@ def test_selectors_register_should_work(
     selector_name = f"tag_{browser_name}"
     selector2_name = f"tag2_{browser_name}"
 
-    print("Registering")
+    print("Registering", browser._impl_obj._contexts)
 
     # Register one engine before creating context.
     selectors.register(selector_name, tag_selector)