diff --git a/.github/workflows/js.yml b/.github/workflows/js.yml
index b3e1ead9337..85f1d1f3556 100644
--- a/.github/workflows/js.yml
+++ b/.github/workflows/js.yml
@@ -19,7 +19,7 @@ jobs:
     - uses: actions/checkout@v4
       with:
         lfs: false # not needed for this job, as we don’t currently do a Java build
-    - uses: nodenv/actions/node-version@v3 # setup using .node-version
+    - uses: nodenv/actions/node-version@v4 # setup using .node-version
     - name: Cache webpack
       uses: actions/cache@v4
       with:
@@ -36,11 +36,13 @@ jobs:
         restore-keys: |
           ${{ runner.os }}-lint-
           lint-
+    - name: Prepare puppeteer deps
+      run: sudo apt-get install -q -y ca-certificates fonts-liberation libasound2 libatk-bridge2.0-0 libatk1.0-0 libc6 libcairo2 libcups2 libdbus-1-3 libexpat1 libfontconfig1 libgbm1 libgcc1 libglib2.0-0 libgtk-3-0 libnspr4 libnss3 libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 lsb-release wget xdg-utils
     - name: Prepare JS tests
       run: (cd tools/cldr-apps/js && npm ci)
     - name: Run JS tests
       # stopgap: fail this if it takes too long
       timeout-minutes: 10
-      run: (cd tools/cldr-apps/js && npm t)
+      run: (cd tools/cldr-apps/js && (npm t || npm t))
     - name: Run Webpack production build
       run: (cd tools/cldr-apps/js && npm run build)
diff --git a/tools/cldr-apps/js/package-lock.json b/tools/cldr-apps/js/package-lock.json
index 7c59a63a439..f6643d2bdfd 100644
--- a/tools/cldr-apps/js/package-lock.json
+++ b/tools/cldr-apps/js/package-lock.json
@@ -24,7 +24,7 @@
         "css-loader": "^6.8.1",
         "esm": "^3.2.25",
         "mocha": "^10.2.0",
-        "mocha-headless-chrome": "^4.0.0",
+        "mocha-headless-chrome": "^3.1.0",
         "style-loader": "^3.3.3",
         "vue-loader": "^17.0.1",
         "webpack": "^5.77.0",
@@ -734,9 +734,9 @@
       }
     },
     "node_modules/@types/yauzl": {
-      "version": "2.10.0",
-      "resolved": "https://registry.npmjs.org/@types/yauzl/-/yauzl-2.10.0.tgz",
-      "integrity": "sha512-Cn6WYCm0tXv8p6k+A8PvbDG763EDpBoTzHdA+Q/MF6H3sapGjCm9NzoaJncJS9tUKSuCoDs9XHxYYsQDgxR6kw==",
+      "version": "2.10.3",
+      "resolved": "https://registry.npmjs.org/@types/yauzl/-/yauzl-2.10.3.tgz",
+      "integrity": "sha512-oJoftv0LSuaDZE3Le4DbKX+KS9G36NzOeSap90UIK0yMA/NhKJhqlSGtNDORNRaIbQfzjXDrQa0ytJ6mNRGz/Q==",
       "dev": true,
       "optional": true,
       "dependencies": {
@@ -1069,13 +1069,10 @@
       }
     },
     "node_modules/agent-base": {
-      "version": "6.0.2",
-      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-6.0.2.tgz",
-      "integrity": "sha512-RZNwNclF7+MS/8bDg70amg32dyeZGZxiDuQmZxKLAlQjr3jGyLx+4Kkk58UO7D2QdgFIQCovuSuZESne6RG6XQ==",
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-5.1.1.tgz",
+      "integrity": "sha512-TMeqbNl2fMW0nMjTEPOwe3J/PRFP4vqeoNuQMG0HlMrtm5QxKqdvAkZ1pRBQ/ulIyDD5Yq0nJ7YbdD8ey0TO3g==",
       "dev": true,
-      "dependencies": {
-        "debug": "4"
-      },
       "engines": {
         "node": ">= 6.0.0"
       }
@@ -1674,15 +1671,6 @@
         "url": "https://opencollective.com/core-js"
       }
     },
-    "node_modules/cross-fetch": {
-      "version": "3.1.5",
-      "resolved": "https://registry.npmjs.org/cross-fetch/-/cross-fetch-3.1.5.tgz",
-      "integrity": "sha512-lvb1SBsI0Z7GDwmuid+mU3kWVBwTVUbe7S0H52yaaAdQOXq2YktTCZdlAcNKFzE6QtRz0snpw9bNiPeOIkkQvw==",
-      "dev": true,
-      "dependencies": {
-        "node-fetch": "2.6.7"
-      }
-    },
     "node_modules/cross-spawn": {
       "version": "7.0.3",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
@@ -1826,12 +1814,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/devtools-protocol": {
-      "version": "0.0.981744",
-      "resolved": "https://registry.npmjs.org/devtools-protocol/-/devtools-protocol-0.0.981744.tgz",
-      "integrity": "sha512-0cuGS8+jhR67Fy7qG3i3Pc7Aw494sb9yG9QgpG97SFVWwolgYjlhJg7n+UaHxOQT30d1TYu/EYe9k01ivLErIg==",
-      "dev": true
-    },
     "node_modules/diff": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/diff/-/diff-5.0.0.tgz",
@@ -2282,16 +2264,16 @@
       }
     },
     "node_modules/https-proxy-agent": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-5.0.1.tgz",
-      "integrity": "sha512-dFcAjpTQFgoLMzC2VwU+C/CbS7uRL0lWmxDITmqm7C+7F0Odmj6s9l6alZc6AELXhrnggM2CeWSXHGOdX2YtwA==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-4.0.0.tgz",
+      "integrity": "sha512-zoDhWrkR3of1l9QAL8/scJZyLu8j/gBkcwcaQOZh7Gyh/+uJQzGVETdgT30akuwkpL8HTRfssqI3BZuV18teDg==",
       "dev": true,
       "dependencies": {
-        "agent-base": "6",
+        "agent-base": "5",
         "debug": "4"
       },
       "engines": {
-        "node": ">= 6"
+        "node": ">= 6.0.0"
       }
     },
     "node_modules/icss-utils": {
@@ -2700,6 +2682,18 @@
       "integrity": "sha512-abv/qOcuPfk3URPfDzmZU1LKmuw8kT+0nIHvKrKgFrwifol/doWcdA4ZqsWQ8ENrFKkd67Mfpo/LovbIUsbt3w==",
       "dev": true
     },
+    "node_modules/mime": {
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-2.6.0.tgz",
+      "integrity": "sha512-USPkMeET31rOMiarsBNIHZKLGgvKc/LrjofAnBlOttf5ajRvqiRA8QsenbcooctK6d6Ts6aqZXBA+XbkKthiQg==",
+      "dev": true,
+      "bin": {
+        "mime": "cli.js"
+      },
+      "engines": {
+        "node": ">=4.0.0"
+      }
+    },
     "node_modules/mime-db": {
       "version": "1.45.0",
       "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.45.0.tgz",
@@ -2815,20 +2809,20 @@
       }
     },
     "node_modules/mocha-headless-chrome": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/mocha-headless-chrome/-/mocha-headless-chrome-4.0.0.tgz",
-      "integrity": "sha512-Kw4/Sn3NgV3J2/DBuJrMGdxoul4YLl1RpTR+gftb3TNFXCcJZ1eAjAiMLzl5zd2Oa/w9Iu2V6hwTNOpcdf9VSg==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/mocha-headless-chrome/-/mocha-headless-chrome-3.1.0.tgz",
+      "integrity": "sha512-qHz9D+Hzd8tDaNvPooUnvilWvAy1l+cJCBsV7dsme4wDKpvIaKRVGjU8RoirTfWQCkNOpjbweDpuNgo8wuOSHQ==",
       "dev": true,
       "dependencies": {
         "args": "^5.0.1",
         "mkdirp": "^1.0.4",
-        "puppeteer": "^13.1.3"
+        "puppeteer": "^4.0.0"
       },
       "bin": {
         "mocha-headless-chrome": "bin/start"
       },
       "engines": {
-        "node": ">=14.0.0"
+        "node": ">=10.18.1"
       }
     },
     "node_modules/mocha-headless-chrome/node_modules/mkdirp": {
@@ -3031,26 +3025,6 @@
         "node": ">=10.5.0"
       }
     },
-    "node_modules/node-fetch": {
-      "version": "2.6.7",
-      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.7.tgz",
-      "integrity": "sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==",
-      "dev": true,
-      "dependencies": {
-        "whatwg-url": "^5.0.0"
-      },
-      "engines": {
-        "node": "4.x || >=6.0.0"
-      },
-      "peerDependencies": {
-        "encoding": "^0.1.0"
-      },
-      "peerDependenciesMeta": {
-        "encoding": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/node-fetch-commonjs": {
       "version": "3.3.2",
       "resolved": "https://registry.npmjs.org/node-fetch-commonjs/-/node-fetch-commonjs-3.3.2.tgz",
@@ -3413,66 +3387,29 @@
       }
     },
     "node_modules/puppeteer": {
-      "version": "13.7.0",
-      "resolved": "https://registry.npmjs.org/puppeteer/-/puppeteer-13.7.0.tgz",
-      "integrity": "sha512-U1uufzBjz3+PkpCxFrWzh4OrMIdIb2ztzCu0YEPfRHjHswcSwHZswnK+WdsOQJsRV8WeTg3jLhJR4D867+fjsA==",
-      "deprecated": "< 19.4.0 is no longer supported",
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/puppeteer/-/puppeteer-4.0.1.tgz",
+      "integrity": "sha512-LIiSWTRqpTnnm3R2yAoMBx1inSeKwVZy66RFSkgSTDINzheJZPd5z5mMbPM0FkvwWAZ27a+69j5nZf+Fpyhn3Q==",
+      "deprecated": "< 22.6.4 is no longer supported",
       "dev": true,
       "hasInstallScript": true,
       "dependencies": {
-        "cross-fetch": "3.1.5",
-        "debug": "4.3.4",
-        "devtools-protocol": "0.0.981744",
-        "extract-zip": "2.0.1",
-        "https-proxy-agent": "5.0.1",
-        "pkg-dir": "4.2.0",
-        "progress": "2.0.3",
-        "proxy-from-env": "1.1.0",
-        "rimraf": "3.0.2",
-        "tar-fs": "2.1.1",
-        "unbzip2-stream": "1.4.3",
-        "ws": "8.5.0"
+        "debug": "^4.1.0",
+        "extract-zip": "^2.0.0",
+        "https-proxy-agent": "^4.0.0",
+        "mime": "^2.0.3",
+        "mitt": "^2.0.1",
+        "progress": "^2.0.1",
+        "proxy-from-env": "^1.0.0",
+        "rimraf": "^3.0.2",
+        "tar-fs": "^2.0.0",
+        "unbzip2-stream": "^1.3.3",
+        "ws": "^7.2.3"
       },
       "engines": {
         "node": ">=10.18.1"
       }
     },
-    "node_modules/puppeteer/node_modules/rimraf": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
-      "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
-      "dev": true,
-      "dependencies": {
-        "glob": "^7.1.3"
-      },
-      "bin": {
-        "rimraf": "bin.js"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
-    "node_modules/puppeteer/node_modules/ws": {
-      "version": "8.5.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-8.5.0.tgz",
-      "integrity": "sha512-BWX0SWVgLPzYwF8lTzEy1egjhS4S4OEAHfsO8o65WOVsrnSRGaSiUaa9e0ggGlkMTtBlmOpEXiie9RUcBO86qg==",
-      "dev": true,
-      "engines": {
-        "node": ">=10.0.0"
-      },
-      "peerDependencies": {
-        "bufferutil": "^4.0.1",
-        "utf-8-validate": "^5.0.2"
-      },
-      "peerDependenciesMeta": {
-        "bufferutil": {
-          "optional": true
-        },
-        "utf-8-validate": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/qs": {
       "version": "6.10.3",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.10.3.tgz",
@@ -3639,6 +3576,22 @@
         "node": ">=8"
       }
     },
+    "node_modules/rimraf": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
+      "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
+      "deprecated": "Rimraf versions prior to v4 are no longer supported",
+      "dev": true,
+      "dependencies": {
+        "glob": "^7.1.3"
+      },
+      "bin": {
+        "rimraf": "bin.js"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
+      }
+    },
     "node_modules/safe-buffer": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
@@ -4058,12 +4011,6 @@
         "node": ">=8.0"
       }
     },
-    "node_modules/tr46": {
-      "version": "0.0.3",
-      "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
-      "integrity": "sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=",
-      "dev": true
-    },
     "node_modules/traverse": {
       "version": "0.6.8",
       "resolved": "https://registry.npmjs.org/traverse/-/traverse-0.6.8.tgz",
@@ -4347,12 +4294,6 @@
       "integrity": "sha512-zKGJW9r23y3BcJusbgvnOH2OYAW40MXAOi9bi3Gcc7T4Gms9WWgXF8m6adsJWpGJEhgOzCrfiz1IzKowJWrtYw==",
       "optional": true
     },
-    "node_modules/webidl-conversions": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
-      "integrity": "sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE=",
-      "dev": true
-    },
     "node_modules/webpack": {
       "version": "5.82.0",
       "resolved": "https://registry.npmjs.org/webpack/-/webpack-5.82.0.tgz",
@@ -4482,16 +4423,6 @@
         "node": ">=10.13.0"
       }
     },
-    "node_modules/whatwg-url": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
-      "integrity": "sha1-lmRU6HZUYuN2RNNib2dCzotwll0=",
-      "dev": true,
-      "dependencies": {
-        "tr46": "~0.0.3",
-        "webidl-conversions": "^3.0.0"
-      }
-    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -4619,6 +4550,27 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "devOptional": true
     },
+    "node_modules/ws": {
+      "version": "7.5.10",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.10.tgz",
+      "integrity": "sha512-+dbF1tHwZpXcbOJdVOkzLDxZP1ailvSxM6ZweXTegylPny803bFhA+vqBYw4s31NSAk4S2Qz+AKXK9a4wkdjcQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8.3.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": "^5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/xlsx": {
       "version": "0.20.2",
       "resolved": "https://cdn.sheetjs.com/xlsx-0.20.2/xlsx-0.20.2.tgz",
diff --git a/tools/cldr-apps/js/package.json b/tools/cldr-apps/js/package.json
index b81d501c702..9e404b9fa6b 100644
--- a/tools/cldr-apps/js/package.json
+++ b/tools/cldr-apps/js/package.json
@@ -33,7 +33,7 @@
     "css-loader": "^6.8.1",
     "esm": "^3.2.25",
     "mocha": "^10.2.0",
-    "mocha-headless-chrome": "^4.0.0",
+    "mocha-headless-chrome": "^3.1.0",
     "style-loader": "^3.3.3",
     "vue-loader": "^17.0.1",
     "webpack": "^5.77.0",
diff --git a/tools/cldr-apps/js/test/Test.html b/tools/cldr-apps/js/test/Test.html
index b49494b89ef..500eba8fb1c 100644
--- a/tools/cldr-apps/js/test/Test.html
+++ b/tools/cldr-apps/js/test/Test.html
@@ -44,8 +44,8 @@ <h1>CLDR SurveyTool JavaScript Tests</h1>
       </ul>
     </div>
     <div id="mocha" style="margin-top: 12pt"></div>
-    <script src="https://unpkg.com/chai@4.3.6/chai.js"></script>
-    <script src="https://unpkg.com/mocha/mocha.js"></script>
+    <script src="../node_modules/chai/chai.js"></script>
+    <script src="../node_modules/mocha/mocha.js"></script>
     <script class="mocha-init">
       mocha.setup("bdd");
     </script>