Thunderbird and disappearing cursor

[Ralf Mardorf]

On Fri, 20 Jul 2018 19:02:41 -0700, ToddAndMargo wrote:
>I was told that controlling the cursor was an Xfce function and not
>Thunderbird by the Thunderbird group.

Hard to believe that something that is known to happen, usually caused
by Thunderbird add-ons or a theme, wasn't mentioned. I'm not using
Thunderbird and just skimmed through hints from Mozilla support for a
few seconds.