The primary drawbacks of the DuckDuckGo browser include its reliance on Bing for search results, less personalized and potentially less comprehensive search results compared to Google, lack of advanced features and integrations like AI overviews and Google Maps, and some security limitations such as not actively preventing malware and allowing Microsoft trackers under specific agreements. Users may also find the browser slower and may not be adequately protected from all forms of online tracking, including browser fingerprinting