When I go to edit>prefs>content>fonts+colours,advanced to choose a font, the lists seem to be quite limited. "proportional" has but two choices, the others all start at A.D. Mono, and, though Times is there, Arial is not. Making a choice is not exactly easy, since we see just a list of font-names, not what the font looks like. Where are the fonts picked up from? How would I install Arial if I need to? But, to choose a font properly, I would want to see a full layout of every available character, plain & italic & bold, together with an example of text/ numbering to see how the spacing is in practice. (This would also be useful in identifying fonts where certain characters are missing.) Is ther such a facility? I use my FF in Linux.