Chrome will now start loading some web pages in the background, even before youve finished typing the URL in the omnibox. Chrome now includes expanded functionality to analyze executable files that you download. Chrome will warn you that the file appears to be malicious and that you should discard it. Chrome’s Safe Browsing technology should help protect you from additional types of malware attacks. Try out these changes in the new Chrome Beta–we look forward to hearing your feedback. As always, please keep a mind that the Beta channel inherently comes with more bugs and kinks to work out.”]
Source: https://chrome.googleblog.com/2012/01/speed-and-security.html