I run benchmark regularly concerning privacy exposure, and I ran one this summer to find out all 3rd parties for a sample of high traffic web sites.<p>I collected and sorted the results by [3rd party, 1st party] pairs: this allows to see at a glance the most ubiquitous 3rd parties out there, i.e. those which have the ability to build a profile of your browsing habits.[1]<p>Facebook (through `facebook.net`) was definitely at the top in the benchmark, when using EasyList, EasyPrivacy, Peter Lowe&#x27;s.[2]<p>I personally doubt a majority of users care that there is a Facebook <i>like</i> widget on any page, except maybe for a handful of sites for those with a Facebook account. So disabling Facebook globally with exceptions where needed is a top advice to reduce privacy exposure.[3]<p>[1] <a href="https:&#x2F;&#x2F;github.com&#x2F;gorhill&#x2F;uBlock&#x2F;wiki&#x2F;Blocking-mode#easy-mode" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;gorhill&#x2F;uBlock&#x2F;wiki&#x2F;Blocking-mode#easy-mo...</a><p>[2] Followed by `googletagservices.com`, `twitter.com`.<p>[3] <a href="https:&#x2F;&#x2F;github.com&#x2F;gorhill&#x2F;uBlock&#x2F;wiki&#x2F;Dynamic-filtering:-to-easily-reduce-privacy-exposure" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;gorhill&#x2F;uBlock&#x2F;wiki&#x2F;Dynamic-filtering:-to...</a>