[$] Avoiding "supercookie" tracking

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