Rated 2 out of 5 stars

It has a good usability, it's stable and secure as far as I can tell.

I use it without any problem with Firefox 3.6.x.

The online documentation is of a very good quality. Very useful for developers.

The only problems that block me are the impossibility to select/trap alert windows and filechooser windows. Thus I use UxU more for unit testing JSM modules and use Mozmill more for functionally testing windows.

Thanks a lot for this great extension!

This review is for a previous version of the add-on (0.7.6).