--- firefox-52.0esr.bak/browser/confvars.sh	2017-03-09 09:11:36.643104656 +0100
+++ firefox-52.0esr/browser/confvars.sh	2017-03-09 11:13:13.798231732 +0100
@@ -62,3 +62,10 @@
 
 # Include the DevTools client, not just the server (which is the default)
 MOZ_DEVTOOLS=all
+
+# Reduce data sharing with Mozilla
+MOZ_DATA_REPORTING=0
+MOZ_TELEMETRY_REPORTING=0
+MOZ_CRASHREPORTER=0
+MOZ_SERVICES_HEALTHREPORT=0
+