In their Browser Addon: If you want to give a bad review, they redirect you to Google Docs. If you want to give a good review, they redirect you to this mozilla page. This way they filter out people who want to leave a honest, bad review...

OK

Sehr hilfreiches Add-on, sowohl privat als auch im professionellen Umfeld.

Got captcha for every request after browser start. Then got captcha after 5-10 queries. But chrome extension work good.

Extensão top!

Très bon plugin et très utile

great job