nice small addon; best for developers

Thank you Stefano. So good & flexible.

A small request next time you work on this: Could you add alternative image/icon for the toolbar button for users who have dark/black background theme, please.

Works flawlessly, shows results in tab it's open besides, while preseting headers in it's sidebar

todo muy bien

We used it for testing JSON communication (POST, GET) and it works very well.

This makes checking http requests easy and systematic.

Needed this to test a PHP system at work. Combines well with "Xdebug Helper for Firefox" by BrianGilbert_. Very comfortable for debugging.

Cheers!