With the new update, the addon no longer makes unnecessary connections to paypalobjects.com, keepa.com, disqus.com at options. Google Analytics was disabled from previous versions. It was never blatant spyware as others have said. It works as good as the defunct RefControl

Developer: Settings by are lost by clear 'offline website data'. localStorage API use in extension is not advised.

Finally learnt how to use this addon, does what it said.
But I cann't find which file the settings are stored. Cause I need to make a portable Firefox version, when I open it on another PC, the Referer Control settings are empty.

After several bug fixes, this addon is now working as intended.

If you were looking for a replacement for the old "RefControl" addon that hasn't received and update since 2014, then this is the addon for you as it does everything that addon does and more.

My only wish is that there was a way to modify preferences from the toolbar instead of having to open up another page.

This looks impressive.

Can you add the a toolbar button to toggle all extension functionality on/off?

(Also note that the current toolbar button to add the site to the db is not working correctly.)