Rated 2 out of 5 stars

yazan: Barki tarih: Mart 24, 2011 ·

its also possible to change this setting in "About:config" without addon !

This review is for a previous version of the add-on (0.2.1-signed.1-signed). 

yazan: trlkly (Geliştirici) tarih: Mart 25, 2011 ·

I acknowledged that in the description. But some people would rather have an addon, apparently. People have been complaining about MRTech's extension not working in Firefox 4, so obviously not everyone wants to edit their about:config.