The Brave browser will take action against websites that snoop on visitors by scanning their open Internet ports or accessing other network resources that can expose personal information.
Starting in version 1.54, Brave will automatically block website port scanning, a practice that a surprisingly large number of sites were found engaging in a few years ago. According to this list compiled in 2021 by a researcher who goes by the handle G666g1e, 744 websites scanned visitors’ ports, most or all without providing notice or seeking permission in advance. eBay, Chick-fil-A, Best Buy, Kroger, and Macy’s were among the offending websites.
Some sites use similar tactics in an attempt to fingerprint visitors so they can be re-identified each time they return, even if they delete browser cookies. By running scripts that access local resources on the visiting devices, the sites can detect unique patterns in a visiting browser. Sometimes there are benign reasons a site will access local resources, such as detecting insecurities or allowing developers to test their websites. Often, however, there are more abusive or malicious motives involved.
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