Unable to change network location while Firefox is open Under the Location option in the top-left Apple menu I have set up a few different options that let me quickly swap between different web proxy configurations when I connect to different networks. Normally I can just choose one and the new settings are applied immediately.

It has started showing this message if I try to choose a different location while Firefox is open.



The location doesn’t change and Firefox doesn’t actually close. I have to press Ignore, close Firefox, change location and re-open Firefox.

What is the cause of this?
I also have this problem. I submitted a bug on bugzilla, the code is 1424709, let's hope they fix it. 

Bugzilla link: https://bugzilla.mozilla.org/show_bug.cgi?id=1424709