Limited use Rated 1 out of 5 stars

Not very useful. Show up only if there is error. Better if can show up and use individual function like whois.

This review is for a previous version of the add-on (1.2.3.1-signed). 

Well, since in the preference page you have the URL of all tools, you can bookmark them and use ubiquitous. This addon is designed specifically for error cases.