Vouch for Noah's review, this is a scam and actual malware. Only install if you want your browser searches to redirect to Yahoo forever.

THIS EXTENSION IS A SCAM. There used to be a truly (as the description mentioned)open-source version of this, but that was sold a few months ago. Since then, the extension has been hijacked to redirect certain websites (like Google searches) to affiliate links for the new owners. After the old extension was reported as a scam, the open-source repository was removed, the website has been taken down, and the email has been changed. DO NOT USED THIS IF YOU VALUE YOUR PRIVACY.