YankeeJim:
Something you might try. Get to that place with the large screen ,right click on it and click on Show All.
I would say Firefox is his browser and his flash version is 23.0.0.207. Icon said that the screen size changing is known issue with that combo. You might want to roll back to an earlier version of flash.
That being said. Fl;ash seems to be updating on some browsers automatically. I have Adobe flash updates set to ask me. But at least 4 of my browsers updated to 23.0.0.207 from 23.0.0.205 without asking.
The browsers that changed are Edge,IE, Maxthon Cloud and Maxthon 5. Anyone else have Adobe Flash updates set to ask before updating have some browsers that updated recently without Adobe asking for permissipon?