The extension overrides the default search engine to [domain withheld] and uses a GUID to track search activity, despite the listing claiming it sets Yahoo Search and the bundled manifest name "Manuals Search" differing from the CWS listing name "Fast Search". It reads configuration from cookies on the search domain and communicates with [domain withheld] for installation tracking. The publisher has a high malware rate in other extensions and user reviews report scam. However, no concrete data exfiltration or unauthorized access is evident beyond the disclosed collection of web history and user activity.