Rated 1 out of 5 stars

This Add-On sets cookies on your system. After the installation of "Do not track plus", I found everytime I open Firefox, 178 new cookies on my sytem (found them with CCleaner). Firefox is not able to delete them.

This review is for a previous version of the add-on (2.0.9.1-signed). 

Opt Out cookies vs tracking cookies - explained

To sum up, those cookies that you're seeing? They're designed to protect your privacy. They're a special type of cookie called an opt-out cookie. If you delete them, you delete their protective qualities.

We fight trackers by both blocking them and opting you out of being tracked. They’re 2 different methods, and you can learn about them here: http://www.donottrackplus.com/whatisoptout.php

There are both good and bad cookies, and the ones that we add to your browser are the good kind. They’re called “opt-out cookies,” and they signal to advertisers that you want to opt-out of receiving target advertising (it's like the "Do Not Call" list for targeted advertising). But while regular cookies tell Web sites information about your online behavior, opt-out cookies tell advertising companies that you *don't want* to receive targeted advertising. They're the same cookies for everybody, so they can't be used to track you, and we keep them from getting deleted to ensure maximum opt-outs. You can read more about the NAI (which is the advertising industry initiative to let people opt-out here:

http://www.networkadvertising.org/managing/opt_out.asp

thanks!