Probably anyone who's interested will know, but I think that it's worth noting that Ghostery (<a href="https://www.ghostery.com" rel="nofollow">https://www.ghostery.com</a>) is <i>not</i> tracking software; it is <i>anti</i>-tracking software, meant to track ads' tracking behaviour. (Thus this purchase is, presumably, a good thing.) I think that calling it an "ad-tracker tool" risks misleading the casual reader.