diff -up firefox-68.1.0/js/xpconnect/src/XPCWrappedNative.cpp.ppc64le-inline firefox-68.1.0/js/xpconnect/src/XPCWrappedNative.cpp
--- firefox-68.1.0/js/xpconnect/src/XPCWrappedNative.cpp.ppc64le-inline	2019-08-26 18:52:28.000000000 +0200
+++ firefox-68.1.0/js/xpconnect/src/XPCWrappedNative.cpp	2019-08-29 08:49:57.695687874 +0200
@@ -1092,7 +1092,11 @@ class MOZ_STACK_CLASS CallMethodHelper f
   MOZ_ALWAYS_INLINE bool GetOutParamSource(uint8_t paramIndex,
                                            MutableHandleValue srcp) const;
 
+#if (__GNUC__ && __linux__ && __PPC64__ && _LITTLE_ENDIAN)
+  bool GatherAndConvertResults();
+#else
   MOZ_ALWAYS_INLINE bool GatherAndConvertResults();
+#endif
 
   MOZ_ALWAYS_INLINE bool QueryInterfaceFastPath();
 
@@ -1139,7 +1143,11 @@ class MOZ_STACK_CLASS CallMethodHelper f
 
   ~CallMethodHelper();
 
+#if (__GNUC__ && __linux__ && __PPC64__ && _LITTLE_ENDIAN)
+  bool Call();
+#else
   MOZ_ALWAYS_INLINE bool Call();
+#endif
 
   // Trace implementation so we can put our CallMethodHelper in a Rooted<T>.
   void trace(JSTracer* aTrc);