Excellent Add-on Rated 5 out of 5 stars
This tool is definitely a MUST like AdBlock.
It allows privacy on a never seen level. After having read some comments here, I watched the communication between firefox an "the internet" with wireshark and found nothing suspicious.
A big surprise was, who tracks me where (even on servers, where I pay for). But this now is a thing of the past.I feel much more secure.
I only had a problem in installing DNT+ in a german environment. So, I tried the chat-function at the developers homepage. Big surprise: I immediately had a competent chat-partner who understood my problem quickly and after less than 1 hour I had a working DNT+ on a new machine.