Firefox 4 not rendering a:visited::before (except color)

Question

I\'m making a custom stylesheet for a particular web site in Firefox 4. In it, I\'m trying to prefix red \'x\'s to links that I\'ve visited. Now, when I say making, I mean i

Answer 1

Selectors including :visited are only allowed to change colors in Firefox 4, yes. That applies whether or not ::before is involved. See http://dbaron.org/mozilla/visited-privacy

I'd be curious to see what CSS you had that allowed you to change something other than colors using :visited.