Rated 3 out of 5 stars

It crashed my firefox, too!
Mozilla/5.0 (X11; U; Linux x86_64; de; rv:1.9.1.7) Gecko/20100106 Ubuntu/9.10 (karmic) Firefox/3.5.7

But it worked well with a portable version of firefox.

This review is for a previous version of the add-on (0.2.3).