As an advocate for privacy rights, I am always interested in new technology. However, I would have to decline from recommending this add-on due to the disturbing search queries it produced.
While most were random confusing noise many were potential "flags" if search records were being analyzed. such as; 12 year old, and 12 year old boy. (I'm glad there was not a click through on these). Many other results concerned the Iraqi revolutionary guard; revolutionary guard join, forces and support Iraqi revolutionary guard, Pakistani forces success, and on and on. I understand these are random generations from news stories, however I would not want these in my search logs.
For now, the laws regarding internet activity have been interpreted to mean that there is basically no expectation of privacy. So unfortunately, people should conduct themselves as such until the laws adapt to protect us from warrant less surveillance.