--- a/exceptionrules.txt
+++ b/exceptionrules.txt
@@ -8005,16 +8005,20 @@ t-online.de#@#.med_anz
 @@||ups.emetriq.de/data?
 @@||uss.xplosion.de/usersync?
 @@||uss.emetriq.de/usersync?
 @@||dyn.xplosion.de/loader/
 @@||dyn.emetriq.de/loader/
 @@||cdn.xplosion.de/adp/
 @@||im.banner.t-online.de/bind?
 
+! Performance Horizon conversion tracking (https://adblockplus.org/forum/viewtopic.php?p=137411#p137411)
+@@||prf.hn/conversion/campaign^$image
+@@||prf.hn/tracking/container.js
+
 ! Global whitelists for ad tags etc.
 @@||googlesyndication.com/pagead/images/mobile_unified_button_icon_black.png|$image
 @@||googlesyndication.com/pagead/images/mobile_unified_button_icon_white.png|$image
 @@||googlesyndication.com/pagead/images/ad_choices_*.png|$image
 @@||googlesyndication.com/pagead/images/adchoices/*.png|$image
 @@||googlesyndication.com/pagead/*_new_ico.gif|$image
 @@||googlesyndication.com/pagead/images/nessie_icon_$image
 @@||googlesyndication.com/pagead/abglogo/*.png|$image