Rated 3 out of 5 stars

A nice little extension, which has potential. History searching has been seen with google for example, so there is a real need for it to become the norm & integrated.
Speaking of integration, I don't think that the address bar & two styles of shortcut are required when it could simply have been included in the search bar as a permanent home.

This review is for a previous version of the add-on (21.1-signed.1-signed).