@ FF3 Users: If you're using PrefBar you don't need this Rated 4 out of 5 stars

If you are using the PrefBar extension, go to http://prefbar.mozdev.org/buttons.html#togglecss and install the "CSS Checkbox 1.0" button. This will create a new item on your PrefBar which happens to do exactly what Read Easily did... :-) HTH

This review is for a previous version of the add-on (1.0.3).