Not better than Linkification Rated 2 out of 5 stars
Recognized links don't have option to open in new tab and moreover Linkificator doesnot recognize some plaintext URLs that Linkification does.This review is for a previous version of the add-on (22.214.171.124-signed).
Option to open in anew tab is useless because Firefox already provide, in standard, this behavior: mouse middle click on the link will open it in a new tab. Moreover, Firefox option exist to manage to open new tab in background or foreground.
Next release will fix problems regarding your html pages.