Unknown stimulus opens unknown popup menu
I am running Firefox 130.0.1 on Ubuntu 24.04.1. I have attached a jpg of the popup window mentioned in the title.
To the best of my knowledge, this window only (and almost always) appears when I am entering characters from a chat box or a text window subordinate to Firefox. I don't know if the popup is generated by Ubuntu or Firefox. Does anyone recognize this as a Firefox popup?
The scenario is this: I am typing away, entering text and for some reason the cursor moves out of the text/chat box. I don't know what I do to cause this to happen. I keep entering text and evidently hit some button that causes the popup to appear. Does anyone know what causes this popup to be displayed?
Thanks, John