Thunderbird displays "tooltip" popup windows containing the complete subject line of the message under the mouse pointer. These windows have w.title == null. Let's ignore such windows rather than causing an exception by trying to call a method on the null.
This means that gnome-magic-window bindings now work for me even when one of these popup windows is active.
Thunderbird displays "tooltip" popup windows containing the complete subject line of the message under the mouse pointer. These windows have
w.title == null
. Let's ignore such windows rather than causing an exception by trying to call a method on the null.This means that gnome-magic-window bindings now work for me even when one of these popup windows is active.