ublock origin has anti-tracker lists, and to use fullstory you add fs.js to the ...

ChoGGi on Jan 17, 2017 | parent | context | favorite | on: Google and Facebook ad traffic is 90% useless

ublock origin has anti-tracker lists, and to use fullstory you add fs.js to the <head>. I could see it being blocked (like I just did in my custom list).