diff -up firefox-60.5.0/layout/base/nsIPresShell.h.1354671 firefox-60.5.0/layout/base/nsIPresShell.h

--- firefox-60.5.0/layout/base/nsIPresShell.h.1354671	2019-01-22 16:08:40.796539950 +0100

+++ firefox-60.5.0/layout/base/nsIPresShell.h	2019-01-22 16:10:25.106069228 +0100

@@ -204,7 +204,7 @@ class nsIPresShell : public nsStubDocume

    * to the same aSize value.  AllocateFrame is infallible and will abort

    * on out-of-memory.

    */

-  void* AllocateFrame(nsQueryFrame::FrameIID aID, size_t aSize) {

+  void* __attribute__((optimize("no-lifetime-dse"))) AllocateFrame(nsQueryFrame::FrameIID aID, size_t aSize) {

     void* result = mFrameArena.AllocateByFrameID(aID, aSize);

     RecordAlloc(result);

     return result;