well, but people usually don't ask for making e.g. the print feature optional because they don't use it and want a lean browser... i mean, you need to draw a line somewhere, sure, but different people will draw it differently.
The 'print' feature is a platform-provided thing. Firefox isn't shipping printer drivers or a printer UI. It simply gives the OS printing subsystem content the user wants to print.
Funnily enough the platform also provides a screenshot system. From another comment it seems like this was driven mostly by user feedback from Windows users, because the ~3 different ways of doing a print screen on Windows are not sufficient and they demand more.
And giving the OS printing subsystem the content the user wants to print requires thousands lines of code in Firefox. Thousands of lines of code many people don't need, while many others do. Just like with any other feature. My parents don't need bookmarks or even tabs, so should we get rid of them in Firefox?
Btw. the screenshot tool of Windows can't capture a webpage properly, only the visible area.
