Haven't seen this tip before. A procedure to remove the build number listed in every Mozilla browser window. Rather than repeat what has already been written and also to give credit where credit is due, I point you to the original tip.
[Editor's note: I tried this, and it does work as advertised (and it's quite nice not seeing the build number in the windowbar title!). However, this hack will have to be reapplied each time you upgrade Mozilla, as it's modifying the actual program files. Does anyone know how you might do this non-destructively? Is it possible?]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020612021851664