If you tell Chrome to block JavaScript on all sites by default, when you browse to a site that uses JavaScript, the upper right corner of the browser displays a box with a red “X” through it.

If you tell Chrome to block JavaScript on all sites by default, when you browse to a site that uses JavaScript, the upper right corner of the browser displays a box with a red “X” through it.

The aim is to block third-party scripts that use "browser re-identification" tricks to extract info about your browser and device.

Google Chrome will soon be able to block JavaScript redirects when users click on a web page link that opens a URL in either a new window or new tab.