diff --git a/dom/base/nsJSEnvironment.cpp b/dom/base/nsJSEnvironment.cpp
index 7777301f622..36361be06c8 100644
--- a/dom/base/nsJSEnvironment.cpp
+++ b/dom/base/nsJSEnvironment.cpp
@@ -4004,7 +4004,7 @@ SetMemoryHighWaterMarkPrefChangedCallback(const char* aPrefName, void* aClosure)
      * In the browser, we don't cap the amount of GC-owned memory.
      */
     JS_SetGCParameter(nsJSRuntime::sRuntime, JSGC_MAX_MALLOC_BYTES,
-                      80L * 1024L * 1024L);
+                      128L * 1024L * 1024L);
     JS_SetGCParameter(nsJSRuntime::sRuntime, JSGC_MAX_BYTES,
                       0xffffffff);
   } else {