On 04/08/2020 11:10 PM, Snidely Whiplash wrote:
> Thank you, but yes, absolutely I am using hardware acceleration. I have been
> using WebRender for a long time, last May, since before they turned it on by
> default in Firefox 68. While it certainly does not occur without WebRender (I
> did test that), it is not an acceptable workaround and not a solution. I'm not
> turning off hardware acceleration in my browser.
> 
> This is a recent problem, in the last few months, and does not happen in other
> window managers.

Agreed -- I just shake the mouse...

-- 
David C. Rankin, J.D.,P.E.