You could try this: '''Global Zoom Factor''' The following setting governs both the "content" area ''and'' the "chrome" area (menus, toolbars, and tabs). If the content is too large after finding a comfortable size for the toolbar area, you can use a reduced default zoom level on the Preferences/Settings page. (1) In a new tab, type or paste '''about:config''' in the address bar and press Return. Click the button promising to be careful. (2) In the filter box, type or paste '''devp''' and pause while the list is filtered (3) The '''layout.css.devPixelsPerPx''' preference has a default value of -1.0 which indicates following the system-level scaling ''Retina Display'' Double-click the preference and change its value to '''3''' -- no minus sign -- which is the equivalent of 150% scaling. You can adjust as needed. If something goes terribly wrong, there is a reset button at the right end of the row. ''Standard Display'' Double-click the preference and change its value to '''1.5''' -- no minus sign -- which is the equivalent of 150% scaling. You can adjust as needed. If something goes terribly wrong, there is a reset button at the right end of the row. What do you think so far?