diff --git a/application/basilisk/app/profile/basilisk.js b/application/basilisk/app/profile/basilisk.js
index 217acae3e9..2bd41ca8f7 100644
--- a/application/basilisk/app/profile/basilisk.js
+++ b/application/basilisk/app/profile/basilisk.js
@@ -1242,7 +1242,13 @@ pref("dom.ipc.cpows.allow-cpows-in-compat-addons", "{b9db16a4-6edc-47ec-a1f4-b86
 // detection).
 pref("dom.ipc.processHangMonitor", true);
 
+#ifdef DEBUG
+// Don't report hangs in DEBUG builds. They're too slow and often a
+// debugger is attached.
 pref("dom.ipc.reportProcessHangs", false);
+#else
+pref("dom.ipc.reportProcessHangs", true);
+#endif
 
 pref("browser.reader.detectedFirstArticle", false);
 // Don't limit how many nodes we care about on desktop: