I don't understand what you mean.

Please explain the problem in detail. What happens? What is/are the exact error message(s) ?

Hi Norbert, do you mean that third button on the main toolbar? The icon artwork in Firefox 89+ (Proton design) is more minimalist and sometimes may be harder to interpret at a quick glance, but I think the button height and width should be the same as a target for clicking.

More generally, there is no built-in way to modify the size of a single icon or button; there is a method to scale up/enlarge the entire UI if you want to try that. For a single icon or a single toolbar, style hackers might have some ideas how to stretch the icon artwork to fill more of the button.

Hello Fred:

Please look at my screen shot. I show the old version (FF78) vs FF91. look at the left hand side The slanting arrow beside the 'return to previous screen' arrow is reduced in size

No error messages Full screen still works if I hit F11

Thanks Jefferson

I just thought someone had a quick solution. I can live with the smaller arrow.

Did the FF developers think the contributors needed more work?? That's why I'm using the ESR channel. AND I have updates disabled in the Registry. I created a batch file that switches it on/off as necessary. I just check if a new version is available and update at my convenience. During the Canadian tax season ( Mar - May) I don't want have my Browser or Computer (Win 10) doing automatic software updates and messing me up. I have enough problems!!

Thanks for your help and talk to you when I have to update the ESR in couple of years. (:)

Hi Norbert, the 78 series is coming to an end in the next two months, so I suspect we will be speaking again before the holidays.

Sorry Jefferson:

I'm now running 91.1 ESR which is the FF 92. So I think I'm good for a while.

I had to bite the bullet and upgraded from 78.14. I will be back @ FF106, if FF is still being supported.  :(