When clicking on the menu items (medium) fast, I get an error alert:
That's all the alert says. And Safari crashes, Firefox not, but shows the same alert. It occurs both with the (wp) menu as with the dropdown. The error (in Firefox):
Error: NS_ERROR_NOT_AVAILABLE: prompt aborted by user
Source File: resource:///components/nsPrompter.js
After disabling/enabling my plugins I found out it is the Responsive Select Menu that does it. I didn't change any of the code. What to do?