I customized my Portable Firefox, and it works very well with only one exception. I keep seeing "DOM Inspector" feature in "Tools" Menu. I do not want it, but I don't know how to get rid of it. Most the work I did were in browser.xul, and I did not see any reference to it in this file. When I deleted "inspector.jar" from my finished output (firefox\chrome\) folder, my application broke.