I've set Tools > Options > Content : Fonts & Colors > Advanced > Minimum Font Size to 10 pt, but when I use Zoom Out, I get smaller fonts: The relation between font sizes on a page is kept. What I want is FF 1.5 behavior: Minimum Font Size is honored even on Zoom Out, which results in shrinking the headlines only and finally ending with all Text in the same size after some repetitions of Zoom Out. I have disabled Tools > Options > Content : Fonts & Colors > Advanced > "Allow pages to choose their own fonts, instead of my selections above". I have set Minimum Font Size for several encodings, but maybe the reason for the current behavior is a missing UTF-8 setting in the Tools > Options > Content : Fonts & Colors > Advanced > "Fonts for" listbox ? Most pages including this support.mozilla.com use that encoding.