diff --git a/toolkit/library/gtest/rust/Cargo.lock b/toolkit/library/gtest/rust/Cargo.lock
index 1419a6962f36..9afc2af7a47e 100644
--- a/toolkit/library/gtest/rust/Cargo.lock
+++ b/toolkit/library/gtest/rust/Cargo.lock
@@ -204,6 +204,11 @@ name = "bitreader"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "boxfnonce"
+version = "0.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "byteorder"
 version = "1.0.0"
@@ -586,6 +591,7 @@ dependencies = [
  "nserror 0.1.0",
  "nsstring 0.1.0",
  "rust_url_capi 0.0.1",
+ "u2fhid 0.1.0",
  "webrender_bindings 0.1.0",
 ]
 
@@ -712,6 +718,29 @@ dependencies = [
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "libudev"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libudev-sys 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libudev-sys"
+version = "0.1.3"
+dependencies = [
+ "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libudev-sys"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+replace = "libudev-sys 0.1.3"
+
 [[package]]
 name = "log"
 version = "0.3.6"
@@ -1436,6 +1465,20 @@ name = "toml"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "u2fhid"
+version = "0.1.0"
+dependencies = [
+ "boxfnonce 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "core-foundation-sys 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "env_logger 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libudev 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "unicode-bidi"
 version = "0.3.3"
@@ -1612,6 +1655,7 @@ dependencies = [
 "checksum bitflags 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1370e9fc2a6ae53aea8b7a5110edbd08836ed87c88736dfabccade1c2b44bff4"
 "checksum bitflags 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4efd02e230a02e18f92fc2735f44597385ed02ad8f831e7c1c1156ee5e1ab3a5"
 "checksum bitreader 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "80b13e2ab064ff3aa0bdbf1eff533f9822dc37899821f5f98c67f263eab51707"
+"checksum boxfnonce 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8380105befe91099e6f69206164072c05bc92427ff6aa8a5171388317346dd75"
 "checksum byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c40977b0ee6b9885c9013cd41d9feffdd22deb3bb4dc3a71d901cc7a77de18c8"
 "checksum cexpr 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "393a5f0088efbe41f9d1fcd062f24e83c278608420e62109feb2c8abee07de7d"
 "checksum cfg-if 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "de1e760d7b6535af4241fca8bd8adf68e2e7edacc6b29f5d399050c5e48cf88c"
@@ -1660,6 +1704,8 @@ dependencies = [
 "checksum lazycell 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ce12306c4739d86ee97c23139f3a34ddf0387bbf181bc7929d287025a8c3ef6b"
 "checksum libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)" = "38f5c2b18a287cf78b4097db62e20f43cace381dc76ae5c0a3073067f78b7ddc"
 "checksum libloading 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "be99f814beb3e9503a786a592c909692bb6d4fc5a695f6ed7987223acfbd5194"
+"checksum libudev 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ea626d3bdf40a1c5aee3bcd4f40826970cae8d80a8fec934c82a63840094dcfe"
+"checksum libudev-sys 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "249a1e347fa266dc3184ebc9b4dc57108a30feda16ec0b821e94b42be20b9355"
 "checksum log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "ab83497bf8bf4ed2a74259c1c802351fcd67a65baa86394b6ba73c36f4838054"
 "checksum matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "efd7622e3022e1a6eaa602c4cea8912254e5582c9c692e9167714182244801b1"
 "checksum memchr 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1dbccc0e46f1ea47b9f17e6d67c5a96bd27030519c519c9c91327e31275a47b4"
diff --git a/toolkit/library/gtest/rust/Cargo.toml b/toolkit/library/gtest/rust/Cargo.toml
index 454303ed71e1..a7b03c4a2a6d 100644
--- a/toolkit/library/gtest/rust/Cargo.toml
+++ b/toolkit/library/gtest/rust/Cargo.toml
@@ -44,3 +44,6 @@ opt-level = 2
 rpath = false
 debug-assertions = false
 panic = "abort"
+
+[replace]
+"libudev-sys:0.1.3" = { path = "../../../../dom/webauthn/libudev-sys" }
diff --git a/toolkit/library/rust/Cargo.lock b/toolkit/library/rust/Cargo.lock
index ed8fb9658402..b0b8e392dc29 100644
--- a/toolkit/library/rust/Cargo.lock
+++ b/toolkit/library/rust/Cargo.lock
@@ -202,6 +202,11 @@ name = "bitreader"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "boxfnonce"
+version = "0.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "byteorder"
 version = "1.0.0"
@@ -584,6 +589,7 @@ dependencies = [
  "nserror 0.1.0",
  "nsstring 0.1.0",
  "rust_url_capi 0.0.1",
+ "u2fhid 0.1.0",
  "webrender_bindings 0.1.0",
 ]
 
@@ -710,6 +716,29 @@ dependencies = [
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "libudev"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libudev-sys 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libudev-sys"
+version = "0.1.3"
+dependencies = [
+ "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libudev-sys"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+replace = "libudev-sys 0.1.3"
+
 [[package]]
 name = "log"
 version = "0.3.6"
@@ -1423,6 +1452,20 @@ name = "toml"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "u2fhid"
+version = "0.1.0"
+dependencies = [
+ "boxfnonce 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "core-foundation-sys 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "env_logger 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libudev 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "unicode-bidi"
 version = "0.3.3"
@@ -1599,6 +1642,7 @@ dependencies = [
 "checksum bitflags 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1370e9fc2a6ae53aea8b7a5110edbd08836ed87c88736dfabccade1c2b44bff4"
 "checksum bitflags 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4efd02e230a02e18f92fc2735f44597385ed02ad8f831e7c1c1156ee5e1ab3a5"
 "checksum bitreader 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "80b13e2ab064ff3aa0bdbf1eff533f9822dc37899821f5f98c67f263eab51707"
+"checksum boxfnonce 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8380105befe91099e6f69206164072c05bc92427ff6aa8a5171388317346dd75"
 "checksum byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c40977b0ee6b9885c9013cd41d9feffdd22deb3bb4dc3a71d901cc7a77de18c8"
 "checksum cexpr 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "393a5f0088efbe41f9d1fcd062f24e83c278608420e62109feb2c8abee07de7d"
 "checksum cfg-if 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "de1e760d7b6535af4241fca8bd8adf68e2e7edacc6b29f5d399050c5e48cf88c"
@@ -1647,6 +1691,8 @@ dependencies = [
 "checksum lazycell 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ce12306c4739d86ee97c23139f3a34ddf0387bbf181bc7929d287025a8c3ef6b"
 "checksum libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)" = "38f5c2b18a287cf78b4097db62e20f43cace381dc76ae5c0a3073067f78b7ddc"
 "checksum libloading 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "be99f814beb3e9503a786a592c909692bb6d4fc5a695f6ed7987223acfbd5194"
+"checksum libudev 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ea626d3bdf40a1c5aee3bcd4f40826970cae8d80a8fec934c82a63840094dcfe"
+"checksum libudev-sys 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "249a1e347fa266dc3184ebc9b4dc57108a30feda16ec0b821e94b42be20b9355"
 "checksum log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "ab83497bf8bf4ed2a74259c1c802351fcd67a65baa86394b6ba73c36f4838054"
 "checksum matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "efd7622e3022e1a6eaa602c4cea8912254e5582c9c692e9167714182244801b1"
 "checksum memchr 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1dbccc0e46f1ea47b9f17e6d67c5a96bd27030519c519c9c91327e31275a47b4"
diff --git a/toolkit/library/rust/Cargo.toml b/toolkit/library/rust/Cargo.toml
index 35ef08c412ad..97f18a2d9b85 100644
--- a/toolkit/library/rust/Cargo.toml
+++ b/toolkit/library/rust/Cargo.toml
@@ -42,3 +42,6 @@ opt-level = 2
 rpath = false
 debug-assertions = false
 panic = "abort"
+
+[replace]
+"libudev-sys:0.1.3" = { path = "../../../dom/webauthn/libudev-sys" }
diff --git a/toolkit/library/rust/shared/Cargo.toml b/toolkit/library/rust/shared/Cargo.toml
index 8ca1eaac6a3d..f6f4e4322132 100644
--- a/toolkit/library/rust/shared/Cargo.toml
+++ b/toolkit/library/rust/shared/Cargo.toml
@@ -20,6 +20,7 @@ encoding_c = "0.8.0"
 encoding_glue = { path = "../../../../intl/encoding_glue" }
 audioipc-client = { path = "../../../../media/audioipc/client", optional = true }
 audioipc-server = { path = "../../../../media/audioipc/server", optional = true }
+u2fhid = { path = "../../../../dom/webauthn/u2f-hid-rs" }
 
 [features]
 default = []
diff --git a/toolkit/library/rust/shared/lib.rs b/toolkit/library/rust/shared/lib.rs
index 4d9e533c304e..5ca6ea3e9198 100644
--- a/toolkit/library/rust/shared/lib.rs
+++ b/toolkit/library/rust/shared/lib.rs
@@ -19,6 +19,7 @@ extern crate encoding_glue;
 extern crate audioipc_client;
 #[cfg(feature = "cubeb-remoting")]
 extern crate audioipc_server;
+extern crate u2fhid;
 
 use std::boxed::Box;
 use std::ffi::CStr;