On click a dropdown button once it open and closes multiple times

Could you provide step by step of the scenarios and clear screenshot?

This is the issue with my browser as I am getting this video only.

First I am clicking on the gear button
On clicking the gear button it will give three options.
but on clicking the Add New Meter option it keeps on open close.

One More thing I would like you to ask…
Can you provide the compatible FF version with Katalon 5.8.6 on linux
and the firefox capabilities.

Thanks in advance