This is caused by Ancestry using ''newrelic'' to host some of its files. The newrelic server is on the Disconnect blocklist used by Firefox ETP in strict mode and possibly used by content blocking extensions and this causes the problem. You can add an exception to disable ETP for your Ancestry website via "Settings -> Privacy & Security". *[[/questions/1406281]] Ancestry missing DNA matches See also: *[https://bugzilla.mozilla.org/show_bug.cgi?id=1818328 1818328] - Ancestry.com DNA results have stopped loading (<i>please do not comment in bug reports<br>https://bugzilla.mozilla.org/page.cgi?id=etiquette.html</i>)