Avoiding "supercookie" tracking

The release of Firefox 85 at the end of January brought a new technique for thwarting yet-another web-tracking scheme. The use of browser cookies for tracking is well-established and the browser makers have taken steps to block the worst abuses there, but users can also take steps to manage and clear those cookies. The arms race continues, however, as tracking companies are using browser caches to store what Mozilla calls "supercookies", which allow users to be tracked across the web sites that they visit. That has led the browser makers to partition these caches by web site in order to prevent this tracking technique.

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