Is there a way to set the *default* monospace font in Safari?

Question

I have a web application that uses the browser's default monospace font. It's set up that way so that the user can pick their own. In Chrome, this works well, as it's easy to set the default fonts, but in Safari, they removed the option.

Is there some way for users to set default fonts in Safari?

Answer 1

There are still unexposed preferences for changing the default fonts and font sizes:

defaults write com.apple.Safari com.apple.Safari.ContentPageGroupIdentifier.WebKit2StandardFontFamily Georgia
defaults write com.apple.Safari com.apple.Safari.ContentPageGroupIdentifier.WebKit2DefaultFontSize 16
defaults write com.apple.Safari com.apple.Safari.ContentPageGroupIdentifier.WebKit2FixedFontFamily Menlo
defaults write com.apple.Safari com.apple.Safari.ContentPageGroupIdentifier.WebKit2DefaultFixedFontSize 14

Another option is to add a rule like this to the default CSS file that can be seleced in Preferences > Advanced > Style sheet:

@font-face {
   font-family: monospace;
   src: local('Menlo');
}

It makes font-family: monospace and elements like <pre> and <code> default to Menlo.