Firefox plugin to convert POST request to GET?

I heard there was a Firefox plugin called "POST-to-GET" but I can't seem to find it. It is 开发者_开发问答supposed to intercept a POST request and convert it to a GET request with the parameters appended to the query string. Does anyone know of a plugin that does this?

Here it is: https://addons.mozilla.org/en-US/firefox/addon/60/

When you install it in the top bar there will be a menu "Forms" click it you'll see a dropdown with multiple options go to "Convert Form Methods" and change accordingly