I had luck getting SVG viewer to work in firefox under win32.  SVG 
viewer is used to view the traffic graphs under the new 1.1 beta of 
m0n0wall.  Scroll down this page a bit to see the section about 
installing SVG viewer in firefox.  http://www.aisee.com/faqs/svg.htm
Basically you just copy two files from the SVG viewer install dir to the 
firefox plugins dir and restart the browser.  One word of caution, SVG 
viewer 3.1 (latest official release from Adobe) caused my firefox to 
lock up and behave erratically.  However the new SVG viewer 6 (newest 
beta from Adobe) works great.  I recommend to anyone who is going to try 
this to use that one with firefox.  Here is the link to that.  
http://www.adobe.com/svg/viewer/install/beta.html

Happy m0n0walling!

Brian Morton
University of Georgia EITS
706-542-3333
brian18 at uga dot edu