diff -rauN a/config/makefiles/rust.mk b/config/makefiles/rust.mk
--- a/config/makefiles/rust.mk	2019-10-25 10:57:20.061421120 +0200
+++ b/config/makefiles/rust.mk	2019-10-25 11:06:30.065708309 +0200
@@ -252,13 +252,13 @@
 # that we are not importing any networking-related functions in rust code. This reduces
 # the chance of proxy bypasses originating from rust code.
 # The check only works when rust code is built with -Clto.
-ifndef MOZ_PROFILE_GENERATE
-ifeq ($(OS_ARCH), Linux)
-ifneq (,$(filter -Clto,$(cargo_rustc_flags)))
-	$(call py_action,check_binary,--target --networking $@)
-endif
-endif
-endif
+#ifndef MOZ_PROFILE_GENERATE
+#ifeq ($(OS_ARCH), Linux)
+#ifneq (,$(filter -Clto,$(cargo_rustc_flags)))
+#	$(call py_action,check_binary,--target --networking $@)
+#endif
+#endif
+#endif
 
 force-cargo-library-check:
 	$(call CARGO_CHECK) --lib $(cargo_target_flag) $(rust_features_flag)