What is a good Firefox extension for autopopulating forms during testing?

Question

What is the best Firefox extension for autocomplete forms during testing?

Preferably one that allows you not to collect data from certain sites ... I only want to use it during testing.

Answer 1

The toolbar has an excellent Forms> Populate Form Fields command that fills a text field valuewith an attribute nameand automatically selects checkboxes and elements from sets of radio buttons.

Answer 2

selenium. . , .

Answer 3

FormBug - , . Firebug...