--- a/testing/talos/talos/xtalos/xperf_whitelist.json
+++ b/testing/talos/talos/xtalos/xperf_whitelist.json
@@ -4,16 +4,17 @@
  "C:\\Windows\\Prefetch\\{prefetch}.pf": {"ignore": true}, 
  "C:\\$Secure": {"ignore": true},
  "C:\\$logfile": {"ignore": true},
  "{firefox}\\omni.ja": {"mincount": 0, "maxcount": 46, "minbytes": 0, "maxbytes": 3014656},
  "{firefox}\\browser\\omni.ja": {"mincount": 0, "maxcount": 28, "minbytes": 0, "maxbytes": 1835008},
  "{firefox}\\browser\\features\\e10srollout@mozilla.org.xpi": {"mincount": 0, "maxcount": 100, "minbytes": 0, "maxbytes": 10000000},
  "{firefox}\\browser\\features\\loop@mozilla.org.xpi": {"mincount": 0, "maxcount": 100, "minbytes": 0, "maxbytes": 10000000},
  "{firefox}\\browser\\features\\firefox@getpocket.com.xpi": {"mincount": 0, "maxcount": 100, "minbytes": 0, "maxbytes": 10000000},
+ "{firefox}\\browser\\features\\webcompat@mozilla.org.xpi": {"mincount": 0, "maxcount": 100, "minbytes": 0, "maxbytes": 10000000},
  "{talos}\\tests\\tp5n\\tp5n.manifest": {"mincount": 0, "maxcount": 8, "minbytes": 0, "maxbytes": 32786},
  "{talos}\\talos\\tests\\tp5n\\tp5n.manifest": {"mincount": 0, "maxcount": 8, "minbytes": 0, "maxbytes": 32786},
  "{talos}\\tests\\tp5n\\tp5n.manifest.develop": {"mincount": 0, "maxcount": 8, "minbytes": 0, "maxbytes": 32786},
  "{talos}\\talos\\tests\\tp5n\\tp5n.manifest.develop": {"mincount": 0, "maxcount": 8, "minbytes": 0, "maxbytes": 32786},
  "{profile}\\localstore.rdf": {"mincount": 2, "maxcount": 2, "minbytes": 8192, "maxbytes": 8192},
  "{firefox}\\dependentlibs.list": {"mincount": 4, "maxcount": 4, "minbytes": 16384, "maxbytes": 16384},
  "{profile}\\content-prefs.sqlite": {"mincount": 6, "maxcount": 6, "minbytes": 65768, "maxbytes": 65768}, 
  "{profile}\\extensions.ini": {"mincount": 2, "maxcount": 2, "minbytes": 8192, "maxbytes": 8192},