$_SERVER["REMOTE_ADDR"] = preg_replace('/.*,\s*/','', $_SERVER["HTTP_X_FORWARDED_FOR"]);
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Program that delivers advertisements on your PC.
Note that many websites have their own advertising, unrelated to adware.
From OneStep website:
OneStep Search helps you navigate the web more easily since you can search directly from the address bar. That means that even if you type a URL that does not exist, instead of your browser returning an error message, you'll get a page of relevant search results.
OneStepSearch can be directly downloaded or bundled with other software.