linux mode firefox, kde wait cursor

[Max Russell]

Has anyone else noticed an issue whereby launching linux binary Firefox
causes the bouncing wait cursor (the Firefox icon) to hang on KDE?

That is to say, while waiting for Firefox to launch you get the wait
bouncing cursor, and then after firefox has loaded, it continues to be the
bouncing cursor.

How can I get rid of this tiny annoyance, apart from not looking at it?