Bug 1951443 - Disable 3pcd in ETP strict. r=bvandersloot

Differential Revision: https://phabricator.services.mozilla.com/D240186

Author: artines1

browser/app/profile/firefox.js

@@ -2362,7 +2362,7 @@ pref("browser.contentblocking.reject-and-isolate-cookies.preferences.ui.enabled"
 //     "btp": BTP enabled
 //     "-btp": BTP disabled
 // One value from each section must be included in the browser.contentblocking.features.strict pref.
-pref("browser.contentblocking.features.strict", "tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cm,fp,stp,emailTP,emailTPPrivate,lvl2,rp,rpTop,ocsp,qps,qpsPBM,fpp,fppPrivate,3pcd,btp");
+pref("browser.contentblocking.features.strict", "tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cm,fp,stp,emailTP,emailTPPrivate,lvl2,rp,rpTop,ocsp,qps,qpsPBM,fpp,fppPrivate,btp");
 
 // Hide the "Change Block List" link for trackers/tracking content in the custom
 // Content Blocking/ETP panel. By default, it will not be visible. There is also