I wanted to have Print functionality on Firefox context menu (the menu that comes visible when I press mouse right button). I do not always want to click the dialogue box all the time when I want to print something. Or move hand to keyboard to use the Ctrl+P keyboard shortcut.
The easiest solution tip I found was to install QuickPrint 0.1.2 to my Firefox browser. It adds “Print” and “Print Preview” functions to context menu. If the context is a frame, additionally “Print Frame” is provided. It is really great to not need to click the dialogue box all the time. Simple and effective. Print or preview with less mouse-work.