Rated 4 out of 5 stars

yazan: andy tarih: Şub. 26, 2015 ·

Whistle reels and vary gpu consumption, sometimes. For instance in the steam pages.

This review is for a previous version of the add-on (3.3.1-signed). 

yazan: David Adler (Geliştirici) tarih: Şub. 26, 2015 ·

This is fixed in the new version Thumbnail Zoom Plus 3.3, which works around the underlying Firefox bug. So update and you'll be good.