Better avoid this addon by now Rated 1 out of 5 stars
Here is an extract from the policy:
"Automatic Information We Collect From the Extension service: When you use the Extension service, we collect information about the websites you visit and the advertisements that you see on those websites, the searches you perform using search engines and when you use the "search" function of the Extension service, the ways in which you use various Extension service features (including whether the Extension service is still installed on your computer), and the pages you view. ......."
Will avoid this addon forever.
We appreciate that you care about the personal information, but don´t worry we collect just harmless information, just statistics to improve the add-on. We don´t use it to identify anybody. We are not evil :-)
Don´t worry and stay with us. You can also turn the statistics off if you want.