diff --git a/.gitmodules b/.gitmodules
index ddfaeb190a0..f5a77314386 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -73,12 +73,6 @@
 [submodule "src/support/alert/rust-alert"]
 	path = src/support/alert/rust-alert
 	url = https://github.com/mozilla-servo/rust-alert.git
-[submodule "src/support/nss/nss"]
-	path = src/support/nss/nss
-	url = https://github.com/mozilla-servo/nss.git
-[submodule "src/support/nss/nspr"]
-	path = src/support/nss/nspr
-	url = https://github.com/mozilla-servo/nspr.git
 [submodule "src/support/glfw/glfw"]
 	path = src/support/glfw/glfw
 	url = https://github.com/mozilla-servo/glfw.git
diff --git a/configure b/configure
index a460952b47a..576f02c953d 100755
--- a/configure
+++ b/configure
@@ -493,8 +493,6 @@ CFG_SUBMODULES="\
     support/hubbub/libhubbub \
     support/hubbub/rust-hubbub \
     support/libparserutils/libparserutils \
-    support/nss/nspr \
-    support/nss/nss \
     support/skia/skia \
     support/spidermonkey/mozjs \
     support/spidermonkey/rust-mozjs \
@@ -653,23 +651,6 @@ do
     ENABLE_DEBUG="$CFG_ENABLE_DEBUG"
 
     case $i in
-        support/nss/nspr)
-            if [ ${CFG_OSTYPE} = "linux-androideabi" ]; then
-            CONFIGURE_ARGS="${CONFIGURE_ARGS} --target=arm-linux-androideabi"
-            CONFIGURE_ARGS="${CONFIGURE_ARGS} --with-android-ndk=${CFG_ANDROID_NDK_PATH}"
-            CONFIGURE_ARGS="${CONFIGURE_ARGS} --with-android-toolchain=${CFG_ANDROID_CROSS_PATH}"
-            else
-            CONFIGURE_ARGS="${CONFIGURE_ARGS} --enable-64bit"
-            fi
-            ;;
-        support/nss/nss)
-            if [ ${CFG_OSTYPE} = "linux-androideabi" ]; then
-            CONFIGURE_ARGS="${CONFIGURE_ARGS} --host=arm-linux-androideabi"
-            CONFIGURE_ARGS="${CONFIGURE_ARGS} --android-toolchain=${CFG_ANDROID_CROSS_PATH}"
-            CONFIGURE_ARGS="${CONFIGURE_ARGS} --android-api-version=14"
-            fi
-            CONFIGURE_ARGS="${CONFIGURE_ARGS} ${EXTRA_CONFIGURE_ARGS}"
-            ;;
         platform/android/libexpat)
             CONFIGURE_SCRIPT="${CFG_SRC_DIR}src/${i}/expat/configure"
             CONFIGURE_ARGS="${CONFIGURE_ARGS} --host=arm-linux-androideabi"
diff --git a/mk/sub.mk b/mk/sub.mk
index 361dd465a15..1bcbdfab566 100644
--- a/mk/sub.mk
+++ b/mk/sub.mk
@@ -7,8 +7,6 @@ SLOW_TESTS += \
 
 # Tests for these submodules do not exist.
 NO_TESTS += \
-	nspr \
-	nss \
 	$(NULL)
 
 # These submodules will not be cleaned by the `make clean-fast` target.
@@ -25,8 +23,6 @@ NATIVE_BUILDS += \
 	libparserutils \
 	mozjs \
 	skia \
-	nss \
-	nspr \
 	glfw \
 	$(NULL)
 
@@ -147,10 +143,6 @@ DEPS_rust-layers += \
 
 endif
 
-DEPS_nss += \
-	nspr \
-	$(NULL)
-
 ifeq ($(CFG_OSTYPE),unknown-linux-gnu)
 
 DEPS_rust-azure += \
diff --git a/src/support/nss/nspr b/src/support/nss/nspr
deleted file mode 160000
index 8219c5c5137..00000000000
--- a/src/support/nss/nspr
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 8219c5c5137b94ae93cfb4afc1dc10a94384e1c6
diff --git a/src/support/nss/nss b/src/support/nss/nss
deleted file mode 160000
index 949eb9848f4..00000000000
--- a/src/support/nss/nss
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 949eb9848f4fa5f83756f3ab7fdf9b0d3f20d37f