diff --git a/.github/requirements.txt b/.github/fluent_linter_requirements.txt
similarity index 100%
rename from .github/requirements.txt
rename to .github/fluent_linter_requirements.txt
diff --git a/.github/font_tests_requirements.txt b/.github/font_tests_requirements.txt
new file mode 100644
index 000000000..e8ce6dfc4
--- /dev/null
+++ b/.github/font_tests_requirements.txt
@@ -0,0 +1 @@
+fonttools==4.*
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1b5c4a796..fa70d5d83 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,6 +24,7 @@ jobs:
         uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
         with:
           node-version: ${{ matrix.node-version }}
+          cache: 'npm'
 
       - name: Install dependencies
         run: npm ci
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 94d36ed7f..0650efe03 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -25,6 +25,7 @@ jobs:
         uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
         with:
           node-version: ${{ matrix.node-version }}
+          cache: 'npm'
 
       - name: Install dependencies
         run: npm ci
diff --git a/.github/workflows/fluent_linter.yml b/.github/workflows/fluent_linter.yml
index f92d1df03..e7dfbca34 100644
--- a/.github/workflows/fluent_linter.yml
+++ b/.github/workflows/fluent_linter.yml
@@ -34,11 +34,10 @@ jobs:
         with:
           python-version: '3.14'
           cache: 'pip'
+          cache-dependency-path: '.github/fluent_linter_requirements.txt'
 
-      - name: Install Fluent dependencies
-        run: |
-          pip install -r .github/requirements.txt
+      - name: Install requirements
+        run: pip install -r .github/fluent_linter_requirements.txt
 
       - name: Lint Fluent reference files
-        run: |
-          moz-fluent-lint ./l10n/en-US --config .github/fluent_linter_config.yml
+        run: moz-fluent-lint ./l10n/en-US --config .github/fluent_linter_config.yml
diff --git a/.github/workflows/font_tests.yml b/.github/workflows/font_tests.yml
index 1dcecb6e9..e8630d330 100644
--- a/.github/workflows/font_tests.yml
+++ b/.github/workflows/font_tests.yml
@@ -46,6 +46,7 @@ jobs:
         uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
         with:
           node-version: ${{ matrix.node-version }}
+          cache: 'npm'
 
       - name: Install dependencies
         run: npm ci
@@ -55,9 +56,10 @@ jobs:
         with:
           python-version: '3.14'
           cache: 'pip'
+          cache-dependency-path: '.github/font_tests_requirements.txt'
 
-      - name: Install Fonttools
-        run: pip install fonttools
+      - name: Install requirements
+        run: pip install -r .github/font_tests_requirements.txt
 
       - name: Run font tests
         run: npx gulp fonttest --headless
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 0fb706004..c9ec2cb58 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -24,6 +24,7 @@ jobs:
         uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
         with:
           node-version: ${{ matrix.node-version }}
+          cache: 'npm'
 
       - name: Install dependencies
         run: npm ci
diff --git a/.github/workflows/prefs_tests.yml b/.github/workflows/prefs_tests.yml
index fb8c91e91..96c8c9784 100644
--- a/.github/workflows/prefs_tests.yml
+++ b/.github/workflows/prefs_tests.yml
@@ -24,6 +24,7 @@ jobs:
         uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
         with:
           node-version: ${{ matrix.node-version }}
+          cache: 'npm'
 
       - name: Install dependencies
         run: npm ci
diff --git a/.github/workflows/publish_release.yml b/.github/workflows/publish_release.yml
index 5fe18a329..b9dd3e9ff 100644
--- a/.github/workflows/publish_release.yml
+++ b/.github/workflows/publish_release.yml
@@ -26,6 +26,7 @@ jobs:
         uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
         with:
           node-version: ${{ matrix.node-version }}
+          cache: 'npm'
           registry-url: 'https://registry.npmjs.org'
 
       - name: Install dependencies
diff --git a/.github/workflows/publish_website.yml b/.github/workflows/publish_website.yml
index f8d12822a..b55d86679 100644
--- a/.github/workflows/publish_website.yml
+++ b/.github/workflows/publish_website.yml
@@ -26,6 +26,7 @@ jobs:
         uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
         with:
           node-version: ${{ matrix.node-version }}
+          cache: 'npm'
 
       - name: Install dependencies
         run: npm ci
diff --git a/.github/workflows/types_tests.yml b/.github/workflows/types_tests.yml
index 9d08a0e05..30d565817 100644
--- a/.github/workflows/types_tests.yml
+++ b/.github/workflows/types_tests.yml
@@ -24,6 +24,7 @@ jobs:
         uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
         with:
           node-version: ${{ matrix.node-version }}
+          cache: 'npm'
 
       - name: Install dependencies
         run: npm ci
diff --git a/.github/workflows/update_locales.yml b/.github/workflows/update_locales.yml
index 49718b679..18ca96bfc 100644
--- a/.github/workflows/update_locales.yml
+++ b/.github/workflows/update_locales.yml
@@ -24,6 +24,7 @@ jobs:
         uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6
         with:
           node-version: lts/*
+          cache: 'npm'
 
       - name: Install dependencies
         run: npm ci