diff --git a/.github/workflows/browser-test.yml b/.github/workflows/browser-test.yml
index df0f7f90c4..a037f6cc56 100644
--- a/.github/workflows/browser-test.yml
+++ b/.github/workflows/browser-test.yml
@@ -12,12 +12,13 @@ jobs:
     runs-on: ubuntu-latest
     if: contains(github.event.pull_request.labels.*.name, 'run-browser-test')
     steps:
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: lts/*
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
+          persist-credentials: false
       - name: 'Cache node_modules'
         uses: actions/cache@v3
         with:
diff --git a/.github/workflows/mocha.yml b/.github/workflows/mocha.yml
index 54642c123a..ab063f88df 100644
--- a/.github/workflows/mocha.yml
+++ b/.github/workflows/mocha.yml
@@ -22,8 +22,10 @@ jobs:
       - name: Check event pull_request
         if: github.event_name == 'pull_request'
         run: 'echo pull_request: run workflow'
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         if: github.event_name == 'push'
+        with:
+          persist-credentials: false
       - name: Check event push
         id: findPr
         if: github.event_name == 'push'
@@ -46,10 +48,11 @@ jobs:
           - 16
           - 18
           - 20
-          - 21
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - uses: actions/setup-node@v4
         with:
           node-version: '${{ matrix.node }}'
       - run: npm install --production
@@ -60,10 +63,12 @@ jobs:
     runs-on: ubuntu-latest
     needs: smoke
     steps:
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: lts/*
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
       - name: 'Cache node_modules'
         uses: actions/cache@v3
         with:
@@ -90,17 +95,18 @@ jobs:
           - 16
           - 18
           - 20
-          - 21
         include:
           - os: ubuntu-latest
             node: 16
             env:
               COVERAGE: 1
     steps:
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: '${{ matrix.node }}'
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
       - name: Get npm cache directory in Windows
         id: npm-cache
         if: ${{ matrix.os == 'windows-2019' }}
@@ -111,8 +117,6 @@ jobs:
         with:
           path: ${{ matrix.os == 'ubuntu-latest' && '~/.npm' || steps.npm-cache.outputs.dir }}
           key: "${{ matrix.os }}-node-v${{ matrix.node }}-${{ hashFiles('**/package-lock.json') }}"
-          restore-keys: |
-            ${{ matrix.os }}-node-v${{ matrix.node }}-
       - name: Install Dependencies
         run: npm ci --ignore-scripts
       - name: Install Annotation Support
@@ -141,19 +145,19 @@ jobs:
     # Don't run forked 'pull_request' without saucelabs token
     if: github.event_name == 'push' || !github.event.pull_request.head.repo.fork
     steps:
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: lts/*
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
       - name: 'Cache node_modules'
         uses: actions/cache@v3
         with:
           path: '~/.npm'
           # this key is different than above, since we are running scripts
           # (builds, postinstall lifecycle hooks, etc.)
-          key: "ubuntu-latest-node-full-v16-${{ hashFiles('**/package-lock.json') }}"
-          restore-keys: |
-            ubuntu-latest-node-full-v16-
+          key: "ubuntu-latest-node-full-lts-${{ hashFiles('**/package-lock.json') }}"
       - name: Install Dependencies
         run: npm ci
       - name: Run Browser Tests
diff --git a/karma.conf.js b/karma.conf.js
index 03762aa142..ea56db757c 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -67,10 +67,6 @@ const baseConfig = {
     showDiff: true
   },
   customLaunchers: {
-    FirefoxDebug: {
-    base: "Firefox",
-    "moz:debuggerAddress": true
-    },
     ChromeDebug: {
       base: 'Chrome',
       flags: ['--remote-debugging-port=9333']
@@ -95,7 +91,6 @@ module.exports = config => {
       bundleDirPath = path.join(BASE_BUNDLE_DIR_PATH, buildId);
       sauceConfig = {
         build: buildId,
-        geckodriverVersion: '0.30.0' // temporary workaround for firefox
       };
     } else {
       console.error(`Local environment (${hostname}) detected`);
@@ -176,7 +171,7 @@ const addSauceTests = (cfg, sauceLabs) => {
     const customLaunchers = sauceBrowsers.reduce((acc, sauceBrowser) => {
       const platformName = SAUCE_BROWSER_PLATFORM_MAP[sauceBrowser];
       const [browserName, browserVersion] = sauceBrowser.split('@');
-      return {
+      const result = {
         ...acc,
         [sauceBrowser]: {
           base: 'SauceLabs',
@@ -186,6 +181,10 @@ const addSauceTests = (cfg, sauceLabs) => {
           'sauce:options': sauceLabs
         }
       };
+      if (browserName === 'firefox') {
+        result[sauceBrowser]['moz:debuggerAddress'] = true;
+      }
+      return result;
     }, {});
 
     return {