The Mozilla Toolkit is a set of APIs, built on top of Gecko, which provide advanced services to XUL applications. These services include Profile Management, Chrome Registration, Browsing History, Extension and Theme Management, Application Update Service, and Safe Mode. (More info)
+++ This bug was initially created as a clone of Bug #805973 +++
This add-ons seems to be the same thing as the Browser Manager add-on. It has nearly 4M users. Let's block it ASAP please.