Hi Firefox, First time in this community and glad you have a support channel community :) When i left-click on download icon, i found that the fonts are too small. (see Picture_showing_Problem.jpg) ''What I tried and 'did not work ''are:'' 1. Change the about:config , layout.css.devPixelsPerPx <-- https://support.mozilla.org/en-US/questions/1239467 2. Try to change font size in preferences https://support.mozilla.org/en-US/questions/1291011 (see Picture_showing_Problem_ with_more_context.jpg) Any advice? If not, I am open to do a firefox reset (uninstall and reinstall) if that's the only solution. Context of How it happened? Not really sure what controls got mess up. My young child was at the computer and meddle the controls before I could stop my kid and suddenly this happen. TYIA, N