Okay, after some Googling about this program, I found that this program adds a set of buttons to the title bar of each running application. There were some changes to the title bar in Firefox 135 (last month) which may be hiding it from FullShot. Could you test this workaround and let me know whether it allows the buttons to display: (1) Open the Customize panel ([[Customize Firefox controls, buttons and toolbars]]) Right-click a toolbar button > Customize Toolbar... (2) Tick the box in the lower left for Title bar. Firefox should now show the current page's title as the window title. Do the buttons return? Click Done when you are finished with this panel.