diff -rauN a/config/makefiles/rust.mk b/config/makefiles/rust.mk
--- a/config/makefiles/rust.mk	2020-10-13 20:23:09.920635480 +0200
+++ b/config/makefiles/rust.mk	2020-10-13 20:24:02.273994137 +0200
@@ -324,17 +324,17 @@
 # the chance of proxy bypasses originating from rust code.
 # The check only works when rust code is built with -Clto but without MOZ_LTO_RUST_CROSS.
 # Sanitizers and sancov also fail because compiler-rt hooks network functions.
-ifndef MOZ_PROFILE_GENERATE
-ifeq ($(OS_ARCH), Linux)
-ifeq (,$(rustflags_sancov)$(MOZ_ASAN)$(MOZ_TSAN)$(MOZ_UBSAN))
-ifndef MOZ_LTO_RUST_CROSS
-ifneq (,$(filter -Clto,$(cargo_rustc_flags)))
-	$(call py_action,check_binary,--target --networking $@)
-endif
-endif
-endif
-endif
-endif
+#ifndef MOZ_PROFILE_GENERATE
+#ifeq ($(OS_ARCH), Linux)
+#ifeq (,$(rustflags_sancov)$(MOZ_ASAN)$(MOZ_TSAN)$(MOZ_UBSAN))
+#ifndef MOZ_LTO_RUST
+#ifneq (,$(filter -Clto,$(cargo_rustc_flags)))
+#	$(call py_action,check_binary,--target --networking $@)
+#endif
+#endif
+#endif
+#endif
+#endif
 
 force-cargo-library-check:
 	$(call CARGO_CHECK) --lib $(cargo_target_flag) $(rust_features_flag)