diff -rauN firefox-79.0/config/rules.mk firefox-79.0-avoid-libxul-OOM-python-check-patch/config/rules.mk
--- firefox-79.0/config/rules.mk	2020-07-21 00:49:36.000000000 +0200
+++ firefox-79.0-avoid-libxul-OOM-python-check-patch/config/rules.mk	2020-08-02 14:04:30.846204786 +0200
@@ -470,7 +470,7 @@
 endif	# MSVC with manifest tool
 else # !WINNT || GNU_CC
 	$(call EXPAND_CC_OR_CXX,$@) -o $@ $(COMPUTED_CXX_LDFLAGS) $(PGO_CFLAGS) $($(notdir $@)_OBJS) $(RESFILE) $(WIN32_EXE_LDFLAGS) $(LDFLAGS) $(STATIC_LIBS) $(MOZ_PROGRAM_LDFLAGS) $(SHARED_LIBS) $(OS_LIBS)
-	$(call py_action,check_binary,--target $@)
+#	$(call py_action,check_binary,--target $@)
 endif # WINNT && !GNU_CC
 
 ifdef ENABLE_STRIP
@@ -526,7 +526,7 @@
 endif	# MSVC with manifest tool
 else
 	$(call EXPAND_CC_OR_CXX,$@) $(COMPUTED_CXX_LDFLAGS) $(PGO_CFLAGS) -o $@ $($@_OBJS) $(WIN32_EXE_LDFLAGS) $(LDFLAGS) $(STATIC_LIBS) $(MOZ_PROGRAM_LDFLAGS) $(SHARED_LIBS) $(OS_LIBS)
-	$(call py_action,check_binary,--target $@)
+#	$(call py_action,check_binary,--target $@)
 endif # WINNT && !GNU_CC
 
 ifdef ENABLE_STRIP
@@ -606,7 +606,7 @@
 	$(RM) $@
 endif
 	$(MKSHLIB) $($@_OBJS) $(RESFILE) $(LDFLAGS) $(STATIC_LIBS) $(SHARED_LIBS) $(EXTRA_DSO_LDOPTS) $(MOZ_GLUE_LDFLAGS) $(OS_LIBS)
-	$(call py_action,check_binary,--target $@)
+#	$(call py_action,check_binary,--target $@)
 
 ifeq (_WINNT,$(GNU_CC)_$(OS_ARCH))
 ifdef MSMANIFEST_TOOL