Steps to Reproduce:

1. Open any page in VisualEditor.

2. Go to Insert > Reference to add a reference. Do NOT click inside the reference box.

3. Go to Insert > Template to add a template.

Actual Results:
You can't add a template, you can't exit the dialog, you can't do anything except close the browser tab and lose all of your work.

Reproducible: Always

This cannot be reproduced in Safari. This cannot be reproduced if you first click inside the reference box.

Version: unspecified
Severity: major