Shameless plug: I wrote a firefox addon that simulates synesthesia by wrapping every character in a span and in a class and adding CSS to assign colors based on

Shameless plug: I wrote a firefox addon that simulates synesthesia by wrapping every character in a span and in a class and adding CSS to assign colors based on its class. It may break some sites. https://addons.mozilla.org/en-US/firefox/addon/synsim/ https://addons.mozilla.org/en-US/firefox/addon/synsim/