Firefox submit form into new tab?

Question

In Safari, if you command-click (Mac) or Control-click (windows) a form submit button, the form submits to a new tab, just as if you command/control-clicked a link. Is there any way to replicate this behavior in Firefox? I find it very useful if there's a form I want to fill out more than once with very small changes. (I.E. a form with 5 fields, where I want to submit it more than once, changing only one of the fields.)

Answer 1

Check out the SubmitToTab add-on.

Allows you to submit a form to a new tab or window. Simply middle-click on a submit button, or hold down the ctrl key before clicking on the button.

Answer 2

According to mozillaZine, the SubmitToTab add-on is "dead". You can find a Firefox 4-compatible rewrite in the TabSubmit add-on.