Yes, please backport 4.12.5 ASAP as it would fix this bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=1461539
It is a very annoying bug and it is fixed in 4.12.5 as stated in this
comment (https://bugzilla.mozilla.org/show_bug.cgi?id=1461539#c10).
Thank you.
** Bug watch added: Mozilla
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xfwm4 (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1796144
Title:
