Does not works.. Rated 5 out of 5 stars

I'm very sorry to say, but this great extension does not works for me any more.. :(
When i attempt to make a download, i'm getting the following error message in a
pop-up:

[JavaScript Application]
Error trying to extract video URL!
TypeError: XMLHttpRequest is not a function

Clicking ok on this message, it prompts me for the download location (as usual),
but when i click "Save", nothing is downloaded..
Some times, in download manager i see the file i attempted to download, having a size of 0.

(v1.6.1, Firefox 16, Windows 7)

UPDATE:
Hi Vítor, many thanks for your fast reaction to resolve the problem and also for
your time to maintain this excellent small piece of software..! Keep walking..
Yes, i can confirm that v1.6.2 does works..! :) :) :)
Thanks again

This review is for a previous version of the add-on (1.6.1). 

Oops

That's bad. It's probably due to some change in recent versions of Firefox. I'll try to check this soon. Thanks for reporting!

UPDATE: Could you try version 1.6.2 and tell me if the problem is solved? You can get it from here:

https://addons.mozilla.org/en-US/firefox/addon/good-old-youtube-downloader/versions/

Thanks in advance!