Firefox Sake

I am still fretting about how I've managed to screw up the Firefox display. Even the previous post (being text) cannot be read by Firefox users. However, for reasons which I don't understand, Firefox still displays photos - so I've taken a photoshop copy of the foregoing message - I'm going to post this every so often to try to help Firefox users who end up here. If anyone knows how to fix my ff display then firefox sake let me know