diff --git a/js/src/jsapi.cpp b/js/src/jsapi.cpp
index ed57b28e3cb..a5f626aed54 100644
--- a/js/src/jsapi.cpp
+++ b/js/src/jsapi.cpp
@@ -1923,12 +1923,15 @@ JS_SetGCParameter(JSRuntime *rt, JSGCParamKey key, uint32_t value)
         break;
       case JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX:
         rt->gcHighFrequencyHeapGrowthMax = value / 100.0;
+        MOZ_ASSERT(rt->gcHighFrequencyHeapGrowthMax / 0.85 > 1.0);
         break;
       case JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN:
         rt->gcHighFrequencyHeapGrowthMin = value / 100.0;
+        MOZ_ASSERT(rt->gcHighFrequencyHeapGrowthMin / 0.85 > 1.0);
         break;
       case JSGC_LOW_FREQUENCY_HEAP_GROWTH:
         rt->gcLowFrequencyHeapGrowth = value / 100.0;
+        MOZ_ASSERT(rt->gcLowFrequencyHeapGrowth / 0.9 > 1.0);
         break;
       case JSGC_DYNAMIC_HEAP_GROWTH:
         rt->gcDynamicHeapGrowth = value;
diff --git a/mobile/android/app/mobile.js b/mobile/android/app/mobile.js
index 4b9dd3a3fa6..93b37060be7 100644
--- a/mobile/android/app/mobile.js
+++ b/mobile/android/app/mobile.js
@@ -412,10 +412,10 @@ pref("javascript.options.gc_on_memory_pressure", false);
 #ifdef MOZ_PKG_SPECIAL
 // low memory devices
 pref("javascript.options.mem.gc_high_frequency_heap_growth_max", 120);
-pref("javascript.options.mem.gc_high_frequency_heap_growth_min", 101);
+pref("javascript.options.mem.gc_high_frequency_heap_growth_min", 120);
 pref("javascript.options.mem.gc_high_frequency_high_limit_mb", 40);
 pref("javascript.options.mem.gc_high_frequency_low_limit_mb", 10);
-pref("javascript.options.mem.gc_low_frequency_heap_growth", 105);
+pref("javascript.options.mem.gc_low_frequency_heap_growth", 120);
 pref("javascript.options.mem.high_water_mark", 16);
 pref("javascript.options.mem.gc_allocation_threshold_mb", 3);
 pref("javascript.options.mem.gc_decommit_threshold_mb", 1);