Have you ever wanted to modify Firefox main context-menu so that you can remove some of the useless or redundant commands from it? Although it is subjective of what you consider as useless(or less useful) but still there are some commands that not many people are going to use on a regular basis and mostly you can access them through main menu-bar or toolbar of the Firefox interface. Fore example I am happy to live without these commands in my Firefox main context-menu to make it smaller and cleaner(and ...