Combo Search is a Google Chrome extension that allows you to change the default search engine used when you search from the address bar. While this certainly appears useful, my concern is that it also sends your queries to the http://feed.combo-search.com/?st=ds&q=test&publisher=combosearch URL first and then redirects you to your chosen search engine. I find this to be a privacy concern as it allows the developer to track what searches are being made and link those to a particular IP address.
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