Privacy? Rated 5 out of 5 stars

Does it collect and report any user data? Or just showing alexa-google ranks without any feedback?

I stopped using official alexa extension because it stores and reports pages users visit which is violation of privacy.

This review is for a previous version of the add-on (1.0.5.1-signed.1-signed). 

You can see the code or use the tool like Fiddler to see that it does not send any user data.