If you are writing an XSL for some particular XML data you have to be outputted into HTML, you may run into a problem when you view your XML data with your XSL transformation applied to it in Firefox. The reason for this is because the Firefox developers have chosen not to implement part of the XSLT specification for disable-output-escape (DOEY).
To get around this, one must make quite a bit of changes to their XSL to accomodate Firefox. This smells alot like what alot of people have to do often for MSIE, except with Firefox being the ugly one this time.
Click to see my example XSL sheet below for a rough reference on how this can be achieved.
