Hi sbpoet, what have you tried so far? Firefox has a global scaling factor to enlarge everything in the toolbar and content areas. Have you tried this and if so, what values have you tried? (1) In a new tab, type or paste '''about:config''' in the address bar and press Enter. Click the button promising to be careful. (2) In the search box in the page, type or paste '''devp''' and pause while the list is filtered (3) Double-click '''layout.css.devPixelsPerPx''' and change its value to '''3.0''' which corresponds to 300%. On Windows, that usually triples the size of everything, but on a Retina display, I think it is only 150% larger. How does that look? You can try 4.0 or other values and see how they work for you. Try not to get too extreme in either direction or the next question may be how to make Firefox usable again. ;-) Can you make the toolbars readable?