How to prevent Firefox from using a specific font?

Question

Fonts

There is the latest Firefox on Windows 8 x64. Added the Ubuntu font kit to the system (“to be”), now Ubuntu Mono is used as a monospace font on bash.im , simply because it is in the system. The CSS rule for the block looks like this:

font-family: 'Monaco','Liberation Mono','Droid Sans Mono','Ubuntu Mono','Lucida Console','Helvetica Neue',monospace;

I want any monospaced font to be rendered as the default Courier New if the page doesn't require a particular font and can be rendered in monospace without removing the custom fonts from the system. Is it possible?

Answer 1

You can use something like: addons.mozilla.org/ru/firefox/addon/greasemonkey/
And just change the styles. :)