diff --git a/packages/telemetry/.eslintrc.js b/packages/telemetry/.eslintrc.js
new file mode 100644
index 00000000000..6c2d7e1b033
--- /dev/null
+++ b/packages/telemetry/.eslintrc.js
@@ -0,0 +1,26 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+module.exports = {
+  extends: '../../config/.eslintrc.js',
+  parserOptions: {
+    project: 'tsconfig.json',
+    // to make vscode-eslint work with monorepo
+    // https://github.com/typescript-eslint/typescript-eslint/issues/251#issuecomment-463943250
+    tsconfigRootDir: __dirname
+  }
+};
diff --git a/packages/telemetry/CHANGELOG.md b/packages/telemetry/CHANGELOG.md
new file mode 100644
index 00000000000..9f41ee41628
--- /dev/null
+++ b/packages/telemetry/CHANGELOG.md
@@ -0,0 +1 @@
+# @firebase/telemetry
diff --git a/packages/telemetry/README.md b/packages/telemetry/README.md
new file mode 100644
index 00000000000..c9b01e6d58e
--- /dev/null
+++ b/packages/telemetry/README.md
@@ -0,0 +1,3 @@
+# @firebase/telemetry
+
+This package provides instrumentation functionality for javascript applications.
diff --git a/packages/telemetry/index.node.ts b/packages/telemetry/index.node.ts
new file mode 100644
index 00000000000..726f98a1289
--- /dev/null
+++ b/packages/telemetry/index.node.ts
@@ -0,0 +1,28 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * This is the file that people using Node.js will actually import. You should
+ * only include this file if you have something specific about your
+ * implementation that mandates having a separate entrypoint. Otherwise you can
+ * just use index.ts
+ */
+
+import { testFxn } from './src';
+
+console.log('Hi Node.js Users!');
+testFxn();
diff --git a/packages/telemetry/index.ts b/packages/telemetry/index.ts
new file mode 100644
index 00000000000..218b9afbb10
--- /dev/null
+++ b/packages/telemetry/index.ts
@@ -0,0 +1,20 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { testFxn } from './src';
+
+testFxn();
diff --git a/packages/telemetry/karma.conf.js b/packages/telemetry/karma.conf.js
new file mode 100644
index 00000000000..baaeb6d6da3
--- /dev/null
+++ b/packages/telemetry/karma.conf.js
@@ -0,0 +1,35 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const karmaBase = require('../../config/karma.base');
+
+const files = [`src/**/*.test.ts`];
+
+module.exports = function (config) {
+  const karmaConfig = {
+    ...karmaBase,
+    // files to load into karma
+    files,
+    // frameworks to use
+    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
+    frameworks: ['mocha']
+  };
+
+  config.set(karmaConfig);
+};
+
+module.exports.files = files;
diff --git a/packages/telemetry/package.json b/packages/telemetry/package.json
new file mode 100644
index 00000000000..c4037b359b8
--- /dev/null
+++ b/packages/telemetry/package.json
@@ -0,0 +1,71 @@
+{
+  "name": "@firebase/telemetry",
+  "version": "0.0.1",
+  "private": true,
+  "description": "The Firebase Web Telemetry package of the Firebase JS SDK",
+  "author": "Firebase <firebase-support@google.com> (https://firebase.google.com/)",
+  "main": "dist/index.node.cjs.js",
+  "browser": "dist/index.esm.js",
+  "module": "dist/index.esm.js",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "node": {
+        "import": "./dist/node-esm/index.node.esm.js",
+        "require": "./dist/index.node.cjs.js"
+      },
+      "browser": {
+        "require": "./dist/index.cjs.js",
+        "import": "./dist/index.esm.js"
+      },
+      "default": "./dist/index.esm.js"
+    },
+    "./package.json": "./package.json"
+  },
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "lint": "eslint -c .eslintrc.js '**/*.ts' --ignore-path '../../.gitignore'",
+    "lint:fix": "eslint --fix -c .eslintrc.js '**/*.ts' --ignore-path '../../.gitignore'",
+    "build": "rollup -c",
+    "build:deps": "lerna run --scope @firebase/telemetry --include-dependencies build",
+    "dev": "rollup -c -w",
+    "test": "run-p --npm-path npm lint test:all",
+    "test:ci": "node ../../scripts/run_tests_in_ci.js -s test:all",
+    "test:all": "run-p --npm-path npm test:browser test:node",
+    "test:browser": "karma start",
+    "test:node": "TS_NODE_COMPILER_OPTIONS='{\"module\":\"commonjs\"}' nyc --reporter lcovonly -- mocha src/**/*.test.* --config ../../config/mocharc.node.js",
+    "trusted-type-check": "tsec -p tsconfig.json --noEmit"
+  },
+  "peerDependencies": {
+    "@firebase/app": "0.x",
+    "@firebase/app-types": "0.x"
+  },
+  "dependencies": {
+    "tslib": "^2.1.0"
+  },
+  "license": "Apache-2.0",
+  "devDependencies": {
+    "@firebase/app": "0.14.1",
+    "jasmine": "5.9.0",
+    "rollup": "2.79.2",
+    "rollup-plugin-typescript2": "0.36.0",
+    "typescript": "5.5.4"
+  },
+  "repository": {
+    "directory": "packages/telemetry",
+    "type": "git",
+    "url": "git+https://github.com/firebase/firebase-js-sdk.git"
+  },
+  "bugs": {
+    "url": "https://github.com/firebase/firebase-js-sdk/issues"
+  },
+  "typings": "dist/index.d.ts",
+  "nyc": {
+    "extension": [
+      ".ts"
+    ],
+    "reportDir": "./coverage/node"
+  }
+}
diff --git a/packages/telemetry/rollup.config.js b/packages/telemetry/rollup.config.js
new file mode 100644
index 00000000000..1450a975ce6
--- /dev/null
+++ b/packages/telemetry/rollup.config.js
@@ -0,0 +1,75 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import typescriptPlugin from 'rollup-plugin-typescript2';
+import typescript from 'typescript';
+import pkg from './package.json';
+import { emitModulePackageFile } from '../../scripts/build/rollup_emit_module_package_file';
+
+const deps = Object.keys(
+  Object.assign({}, pkg.peerDependencies, pkg.dependencies)
+);
+
+const buildPlugins = [typescriptPlugin({ typescript })];
+
+const browserBuilds = [
+  {
+    input: 'index.ts',
+    output: {
+      file: pkg.module,
+      format: 'es',
+      sourcemap: true
+    },
+    plugins: buildPlugins,
+    external: id => deps.some(dep => id === dep || id.startsWith(`${dep}/`))
+  },
+  {
+    input: 'index.ts',
+    output: {
+      file: './dist/index.cjs.js',
+      format: 'cjs',
+      sourcemap: true
+    },
+    plugins: buildPlugins,
+    external: id => deps.some(dep => id === dep || id.startsWith(`${dep}/`))
+  }
+];
+
+const nodeBuilds = [
+  {
+    input: 'index.node.ts',
+    output: {
+      file: pkg.main,
+      format: 'cjs',
+      sourcemap: true
+    },
+    plugins: buildPlugins,
+    external: id => deps.some(dep => id === dep || id.startsWith(`${dep}/`))
+  },
+  {
+    input: 'index.node.ts',
+    output: {
+      file: pkg.exports['.'].node.import,
+      format: 'es',
+      sourcemap: true
+    },
+    plugins: [...buildPlugins, emitModulePackageFile()],
+    external: id => deps.some(dep => id === dep || id.startsWith(`${dep}/`))
+  }
+];
+
+export default [...browserBuilds, ...nodeBuilds];
diff --git a/packages/telemetry/src/index.test.ts b/packages/telemetry/src/index.test.ts
new file mode 100644
index 00000000000..4b314ac8835
--- /dev/null
+++ b/packages/telemetry/src/index.test.ts
@@ -0,0 +1,31 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { expect } from 'chai';
+import { testFxn } from './index';
+
+describe('Simple test', () => {
+  it('Should skip this test');
+  it('Should test this function', () => {
+    expect(testFxn()).to.equal(42);
+  });
+  it('Should test this async thing', async () => {
+    // Do some async assertions, you can use `await` syntax if it helps
+    const val = await Promise.resolve(42);
+    expect(val).to.equal(42);
+  });
+});
diff --git a/packages/telemetry/src/index.ts b/packages/telemetry/src/index.ts
new file mode 100644
index 00000000000..8dca8834e11
--- /dev/null
+++ b/packages/telemetry/src/index.ts
@@ -0,0 +1,24 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { TestType } from './types/index';
+
+export function testFxn(): number {
+  const _thing: TestType = {};
+  console.log('hi');
+  return 42;
+}
diff --git a/packages/telemetry/src/types/index.ts b/packages/telemetry/src/types/index.ts
new file mode 100644
index 00000000000..8626d54ad64
--- /dev/null
+++ b/packages/telemetry/src/types/index.ts
@@ -0,0 +1,20 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export interface TestType {
+  prop?: string;
+}
diff --git a/packages/telemetry/tsconfig.json b/packages/telemetry/tsconfig.json
new file mode 100644
index 00000000000..4e0ae05eebc
--- /dev/null
+++ b/packages/telemetry/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "extends": "../../config/tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "dist"
+  },
+  "exclude": ["dist/**/*"]
+}
diff --git a/yarn.lock b/yarn.lock
index 540d7bc7171..c0fb6bc7414 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9842,6 +9842,11 @@ jasmine-core@~2.8.0:
   resolved "https://registry.npmjs.org/jasmine-core/-/jasmine-core-2.8.0.tgz#bcc979ae1f9fd05701e45e52e65d3a5d63f1a24e"
   integrity sha512-SNkOkS+/jMZvLhuSx1fjhcNWUC/KG6oVyFUGkSBEr9n1axSNduWU8GlI7suaHXr4yxjet6KjrUZxUTE5WzzWwQ==
 
+jasmine-core@~5.9.0:
+  version "5.9.0"
+  resolved "https://registry.npmjs.org/jasmine-core/-/jasmine-core-5.9.0.tgz#140199862ee83f906bf0ff88287e7c440a1776e7"
+  integrity sha512-OMUvF1iI6+gSRYOhMrH4QYothVLN9C3EJ6wm4g7zLJlnaTl8zbaPOr0bTw70l7QxkoM7sVFOWo83u9B2Fe2Zng==
+
 jasmine@2.8.0:
   version "2.8.0"
   resolved "https://registry.npmjs.org/jasmine/-/jasmine-2.8.0.tgz#6b089c0a11576b1f16df11b80146d91d4e8b8a3e"
@@ -9851,6 +9856,14 @@ jasmine@2.8.0:
     glob "^7.0.6"
     jasmine-core "~2.8.0"
 
+jasmine@5.9.0:
+  version "5.9.0"
+  resolved "https://registry.npmjs.org/jasmine/-/jasmine-5.9.0.tgz#aff3c5d3b79fea0e4ce0678ae02bbcfe47b55d3a"
+  integrity sha512-SspK51QMnuC92z5zpF4kOkWN+MyZZDOBv8zgzlMAYvMD0UoGwcq5yYaDe1mrpN7wXZ2CFXh5y8Ua2ugwE4OmXQ==
+  dependencies:
+    glob "^10.2.2"
+    jasmine-core "~5.9.0"
+
 jasminewd2@^2.1.0:
   version "2.2.0"
   resolved "https://registry.npmjs.org/jasminewd2/-/jasminewd2-2.2.0.tgz#e37cf0b17f199cce23bea71b2039395246b4ec4e"
@@ -15139,7 +15152,7 @@ string-argv@~0.3.1:
   resolved "https://registry.npmjs.org/string-argv/-/string-argv-0.3.2.tgz#2b6d0ef24b656274d957d54e0a4bbf6153dc02b6"
   integrity sha512-aqD2Q0144Z+/RqG52NeHEkZauTAUWJO8c6yTftGJKO3Tja5tUgIfmIl6kExvhtxSDP7fXB6DvzkfMpCd/F3G+Q==
 
-"string-width-cjs@npm:string-width@^4.2.0", "string-width@^1.0.2 || 2 || 3 || 4", string-width@^4.0.0, string-width@^4.1.0, string-width@^4.2.0, string-width@^4.2.2, string-width@^4.2.3:
+"string-width-cjs@npm:string-width@^4.2.0":
   version "4.2.3"
   resolved "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz#269c7117d27b05ad2e536830a8ec895ef9c6d010"
   integrity sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==
@@ -15157,6 +15170,15 @@ string-width@^1.0.1, string-width@^1.0.2:
     is-fullwidth-code-point "^1.0.0"
     strip-ansi "^3.0.0"
 
+"string-width@^1.0.2 || 2 || 3 || 4", string-width@^4.0.0, string-width@^4.1.0, string-width@^4.2.0, string-width@^4.2.2, string-width@^4.2.3:
+  version "4.2.3"
+  resolved "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz#269c7117d27b05ad2e536830a8ec895ef9c6d010"
+  integrity sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==
+  dependencies:
+    emoji-regex "^8.0.0"
+    is-fullwidth-code-point "^3.0.0"
+    strip-ansi "^6.0.1"
+
 string-width@^2.1.1:
   version "2.1.1"
   resolved "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz#ab93f27a8dc13d28cac815c462143a6d9012ae9e"
@@ -15220,7 +15242,7 @@ string_decoder@~1.1.1:
   dependencies:
     safe-buffer "~5.1.0"
 
-"strip-ansi-cjs@npm:strip-ansi@^6.0.1", strip-ansi@^6.0.0, strip-ansi@^6.0.1:
+"strip-ansi-cjs@npm:strip-ansi@^6.0.1":
   version "6.0.1"
   resolved "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz#9e26c63d30f53443e9489495b2105d37b67a85d9"
   integrity sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==
@@ -15241,6 +15263,13 @@ strip-ansi@^4.0.0:
   dependencies:
     ansi-regex "^3.0.0"
 
+strip-ansi@^6.0.0, strip-ansi@^6.0.1:
+  version "6.0.1"
+  resolved "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz#9e26c63d30f53443e9489495b2105d37b67a85d9"
+  integrity sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==
+  dependencies:
+    ansi-regex "^5.0.1"
+
 strip-ansi@^7.0.1:
   version "7.1.0"
   resolved "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz#d5b6568ca689d8561370b0707685d22434faff45"
@@ -16913,7 +16942,7 @@ workerpool@6.2.0:
   resolved "https://registry.npmjs.org/workerpool/-/workerpool-6.2.0.tgz#827d93c9ba23ee2019c3ffaff5c27fccea289e8b"
   integrity sha512-Rsk5qQHJ9eowMH28Jwhe8HEbmdYDX4lwoMWshiCXugjtHqMD9ZbiqSDLxcsfdqsETPzVUtX5s1Z5kStiIM6l4A==
 
-"wrap-ansi-cjs@npm:wrap-ansi@^7.0.0", wrap-ansi@^7.0.0:
+"wrap-ansi-cjs@npm:wrap-ansi@^7.0.0":
   version "7.0.0"
   resolved "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz#67e145cff510a6a6984bdf1152911d69d2eb9e43"
   integrity sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==
@@ -16947,6 +16976,15 @@ wrap-ansi@^6.0.1, wrap-ansi@^6.2.0:
     string-width "^4.1.0"
     strip-ansi "^6.0.0"
 
+wrap-ansi@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz#67e145cff510a6a6984bdf1152911d69d2eb9e43"
+  integrity sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==
+  dependencies:
+    ansi-styles "^4.0.0"
+    string-width "^4.1.0"
+    strip-ansi "^6.0.0"
+
 wrap-ansi@^8.1.0:
   version "8.1.0"
   resolved "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-8.1.0.tgz#56dc22368ee570face1b49819975d9b9a5ead214"