Rated 5 out of 5 stars

Fantastic add-on.

Only one issue: paste and go must be disabled through about:config (set extensions.tabutils.shortcut.key_pasteAndGo = false), as there is no UI option.

If you often accidentally paste outside of a text box (and Firefox loads your clipboard's contents, bringing you to another page and possibly making you lose your data) this tip will be helpful.

This review is for a previous version of the add-on (1.5.1). 

Disabled by default in 1.6pre17+.