diff -up thunderbird-68.1.0/js/xpconnect/src/XPCWrappedNative.cpp.mozbz-1512162 thunderbird-68.1.0/js/xpconnect/src/XPCWrappedNative.cpp
--- thunderbird-68.1.0/js/xpconnect/src/XPCWrappedNative.cpp.mozbz-1512162	2019-09-10 01:43:33.000000000 +0200
+++ thunderbird-68.1.0/js/xpconnect/src/XPCWrappedNative.cpp	2019-09-12 16:16:52.644123766 +0200
@@ -1092,7 +1092,7 @@ class MOZ_STACK_CLASS CallMethodHelper f
   MOZ_ALWAYS_INLINE bool GetOutParamSource(uint8_t paramIndex,
                                            MutableHandleValue srcp) const;
 
-  MOZ_ALWAYS_INLINE bool GatherAndConvertResults();
+  bool GatherAndConvertResults();
 
   MOZ_ALWAYS_INLINE bool QueryInterfaceFastPath();
 
@@ -1139,7 +1139,7 @@ class MOZ_STACK_CLASS CallMethodHelper f
 
   ~CallMethodHelper();
 
-  MOZ_ALWAYS_INLINE bool Call();
+  bool Call();
 
   // Trace implementation so we can put our CallMethodHelper in a Rooted<T>.
   void trace(JSTracer* aTrc);