menu automatically close in firefox on macOS

[trukhinyuri]

menu automatically close after right mouse click in firefox on macOS in my app and demo app http://ax5.io/ax5ui-menu/demo/index.html
Problem reproduction: https://youtu.be/PkxXDFecyPQ (unlisted video)

[thomasJang]

Thank you very much for your detailed explanation of the problem.
The problem was that APIs that cancel "events" in Firefox browsers behave differently than they should.
A patch that resolves the issue is being deployed. It will probably be 1.3.70.

Have a nice day.

[trukhinyuri]

Thank you very much!
It works! :)