version 7 Rated 4 out of 5 stars

works well for saving passwords for proxy.. Not working with T/Bird version 7 though.. thanks for the effort

This review is for a previous version of the add-on (3.0.2). 

fixed @v3.0.3

https://addons.mozilla.org/en-US/firefox/addon/guifiproxy/versions/?page=1#version-3.0.3