diff --git a/build/sparse-profiles/taskgraph b/build/sparse-profiles/taskgraph
index 485ec7ec44a1..c715a130157f 100644
--- a/build/sparse-profiles/taskgraph
+++ b/build/sparse-profiles/taskgraph
@@ -37,6 +37,14 @@ path:package.json
 path:package-lock.json
 path:tools/lint/
 
+# for other node toolchain packaging
+path:browser/extensions/newtab/package.json
+path:browser/extensions/newtab/package-lock.json
+path:browser/components/aboutwelcome/package.json
+path:browser/components/aboutwelcome/package-lock.json
+path:browser/components/asrouter/package.json
+path:browser/components/asrouter/package-lock.json
+
 # for new-style try pushes
 path:try_task_config.json
 
diff --git a/taskcluster/kinds/source-test/node.yml b/taskcluster/kinds/source-test/node.yml
index 131bdc347d99..a5347c60ded6 100644
--- a/taskcluster/kinds/source-test/node.yml
+++ b/taskcluster/kinds/source-test/node.yml
@@ -33,14 +33,14 @@ newtab-unit-tests:
             - target.tar.xz
         toolchain:
             - linux64-node
+            - node-modules
+            - newtab-node-modules
     run:
         command: >
             cd /builds/worker/checkouts/gecko &&
-            rm -rf node_modules &&
-            npm ci &&
+            cp -r $MOZ_FETCHES_DIR/node_modules node_modules &&
             cd /builds/worker/checkouts/gecko/browser/extensions/newtab &&
-            rm -rf node_modules &&
-            npm ci &&
+            cp -r $MOZ_FETCHES_DIR/newtab/node_modules node_modules &&
             FIREFOX_BIN=$MOZ_FETCHES_DIR/firefox/firefox node bin/try-runner.js
     when:
         files-changed:
@@ -66,14 +66,14 @@ newtab-unit-tests-ccov:
             - target.tar.xz
         toolchain:
             - linux64-node
+            - node-modules
+            - newtab-node-modules
     run:
         command: >
             cd /builds/worker/checkouts/gecko &&
-            rm -rf node_modules &&
-            npm ci &&
+            cp -r $MOZ_FETCHES_DIR/node_modules node_modules &&
             cd /builds/worker/checkouts/gecko/browser/extensions/newtab &&
-            rm -rf node_modules &&
-            npm ci &&
+            cp -r $MOZ_FETCHES_DIR/newtab/node_modules node_modules &&
             FIREFOX_BIN=$MOZ_FETCHES_DIR/firefox/firefox node bin/try-runner.js
     # This should only run on mozilla-central, as the bot will only parse mozilla-central
     # coverage anyways.
@@ -94,17 +94,19 @@ messagingsystem-unit-tests:
                 linux1804-64/opt: build-linux64/opt
             default:
                 linux1804-64/opt: build-linux64-shippable/opt
+    fetches:
+        toolchain:
+            - node-modules
+            - aboutwelcome-node-modules
+            - asrouter-node-modules
     run:
         command: >
             cd /builds/worker/checkouts/gecko &&
-            rm -rf node_modules &&
-            npm ci &&
+            cp -r $MOZ_FETCHES_DIR/node_modules node_modules &&
             cd /builds/worker/checkouts/gecko/browser/components/aboutwelcome &&
-            rm -rf node_modules &&
-            npm ci &&
+            cp -r $MOZ_FETCHES_DIR/aboutwelcome/node_modules node_modules &&
             cd /builds/worker/checkouts/gecko/browser/components/asrouter &&
-            rm -rf node_modules &&
-            npm ci &&
+            cp -r $MOZ_FETCHES_DIR/asrouter/node_modules node_modules &&
             node bin/try-runner.js
     when:
         files-changed:
@@ -126,17 +128,19 @@ messagingsystem-unit-tests-ccov:
                 linux1804-64/opt: build-linux64/opt
             default:
                 linux1804-64/opt: build-linux64-shippable/opt
+    fetches:
+        toolchain:
+            - node-modules
+            - aboutwelcome-node-modules
+            - asrouter-node-modules
     run:
         command: >
             cd /builds/worker/checkouts/gecko &&
-            rm -rf node_modules &&
-            npm ci &&
+            cp -r $MOZ_FETCHES_DIR/node_modules node_modules &&
             cd /builds/worker/checkouts/gecko/browser/components/aboutwelcome &&
-            rm -rf node_modules &&
-            npm ci &&
+            cp -r $MOZ_FETCHES_DIR/aboutwelcome/node_modules node_modules &&
             cd /builds/worker/checkouts/gecko/browser/components/asrouter &&
-            rm -rf node_modules &&
-            npm ci &&
+            cp -r $MOZ_FETCHES_DIR/asrouter/node_modules node_modules &&
             node bin/try-runner.js
     # This should only run on mozilla-central, as the bot will only parse mozilla-central
     # coverage anyways.
diff --git a/taskcluster/kinds/toolchain/misc.yml b/taskcluster/kinds/toolchain/misc.yml
index 95fbdf380ffb..6e3e68d46542 100644
--- a/taskcluster/kinds/toolchain/misc.yml
+++ b/taskcluster/kinds/toolchain/misc.yml
@@ -407,6 +407,38 @@ browsertime:
         toolchain:
             - linux64-node
 
+aboutwelcome-node-modules:
+    description: "npm install aboutwelcome node_modules"
+    treeherder:
+        symbol: TL(aboutwelcome-node)
+    run:
+        script: generic-node-modules.sh
+        arguments: ['aboutwelcome', 'browser/components/aboutwelcome/']
+        sparse-profile: null
+        resources:
+            - 'browser/components/aboutwelcome/package.json'
+            - 'browser/components/aboutwelcome/package-lock.json'
+        toolchain-artifact: public/build/aboutwelcome-node-modules.tar.zst
+    fetches:
+        toolchain:
+            - linux64-node
+
+asrouter-node-modules:
+    description: "npm install asrouter node_modules"
+    treeherder:
+        symbol: TL(asrouter-node)
+    run:
+        script: generic-node-modules.sh
+        arguments: ['asrouter', 'browser/components/asrouter/']
+        sparse-profile: null
+        resources:
+            - 'browser/components/asrouter/package.json'
+            - 'browser/components/asrouter/package-lock.json'
+        toolchain-artifact: public/build/asrouter-node-modules.tar.zst
+    fetches:
+        toolchain:
+            - linux64-node
+
 eslint-plugin-mozilla:
     description: "npm install eslint-plugin-mozilla node_modules"
     treeherder:
@@ -422,6 +454,23 @@ eslint-plugin-mozilla:
         toolchain:
             - linux64-node
 
+
+newtab-node-modules:
+    description: "npm install newtab node_modules"
+    treeherder:
+        symbol: TL(newtab-node)
+    run:
+        script: generic-node-modules.sh
+        arguments: ['newtab', 'browser/extensions/newtab/']
+        sparse-profile: null
+        resources:
+            - 'browser/extensions/newtab/package.json'
+            - 'browser/extensions/newtab/package-lock.json'
+        toolchain-artifact: public/build/newtab-node-modules.tar.zst
+    fetches:
+        toolchain:
+            - linux64-node
+
 node-modules:
     description: "npm install top-level node_modules"
     treeherder:
diff --git a/taskcluster/scripts/misc/generic-node-modules.sh b/taskcluster/scripts/misc/generic-node-modules.sh
new file mode 100755
index 000000000000..85ceab5a91d3
--- /dev/null
+++ b/taskcluster/scripts/misc/generic-node-modules.sh
@@ -0,0 +1,20 @@
+#!/bin/bash -vex
+
+set -x -e
+
+echo "running as" $(id)
+
+set -v
+
+cd $GECKO_PATH
+
+export PATH=$PATH:$MOZ_FETCHES_DIR/node/bin
+
+rm -rf $2/node_modules
+npm ci --prefix $2
+
+# We have $2/{node_modules,...} and want $1/{node_modules}.
+mkdir -p /builds/worker/artifacts
+cd $2
+cd ..
+tar caf /builds/worker/artifacts/$1-node-modules.tar.zst $1/node_modules