diff --git a/js/public/GCAPI.h b/js/public/GCAPI.h
index f1d3d5c4cbc9..7f960dafb81b 100644
--- a/js/public/GCAPI.h
+++ b/js/public/GCAPI.h
@@ -401,7 +401,7 @@ typedef enum JSGCParamKey {
    * JS::RunIdleTimeGCTask will collect the nursery if it hasn't been collected
    * in this many milliseconds.
    *
-   * Default: 2000
+   * Default: 5000
    * Pref: None
    */
   JSGC_NURSERY_TIMEOUT_FOR_IDLE_COLLECTION_MS = 46,
diff --git a/js/src/gc/Scheduling.h b/js/src/gc/Scheduling.h
index f6b6ac22ee6f..aba12cbe0d83 100644
--- a/js/src/gc/Scheduling.h
+++ b/js/src/gc/Scheduling.h
@@ -414,7 +414,7 @@ static const double NurseryFreeThresholdForIdleCollectionFraction = 0.25;
 
 /* JSGC_NURSERY_TIMEOUT_FOR_IDLE_COLLECTION_MS */
 static const TimeDuration NurseryTimeoutForIdleCollection =
-    TimeDuration::FromSeconds(2.0);
+    TimeDuration::FromSeconds(5.0);
 
 /* JSGC_PRETENURE_THRESHOLD */
 static const double PretenureThreshold = 0.6;