Excellent! I just created my FFox account so I could provide feedback for this plugin. It's now one of the 3-4 PI's I'll always use.

Needed something to print API docs for some libraries which had lots of extraneous menu items along the left, etc.

With this plugin, you've got the ability to select page elements (similar to using the browser "inspector" tools) and then hide/delete the ones you want. The best part is that it support "negative" selections, i.e. you can choose an element you want and delete everything except the one selected. Makes it easy to choose what to print.