Online criminals have been increasing their use of malicious software that can silently hijack your browser settings. Bad guys trick you into installing and running this kind of software by bundling it with something you might want, like a free screensaver, a video plugin orironicallya supposed security update. We’re taking steps to help, including adding a “reset browser settings” button in the last Chrome update. In the current Canary build of Chrome, well automatically block downloads of malware that we detect.”]
Source: https://chrome.googleblog.com/2013/10/dont-mess-with-my-browser.html