diff --git a/.npmignore b/.npmignore
index 7ce25572f8..08aa7c2c78 100644
--- a/.npmignore
+++ b/.npmignore
@@ -10,8 +10,11 @@ lib/injected/
 !lib/**/*.d.ts
 !index.d.ts
 
-# root for "playwright" package
+# used for npm install scripts
+!download-browser.js
+
+# root for "playwright-core" package
 !index.js
 
-# root for "playwright/web"
+# root for "playwright-core/web"
 !web.js
diff --git a/download-browser.js b/download-browser.js
new file mode 100644
index 0000000000..5c7d7502fc
--- /dev/null
+++ b/download-browser.js
@@ -0,0 +1,60 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * 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.
+ */
+
+async function downloadBrowser(browser) {
+  const playwright = require('.')[browser];
+  let progressBar = null;
+  let lastDownloadedBytes = 0;
+  function onProgress(downloadedBytes, totalBytes) {
+    if (!progressBar) {
+      const ProgressBar = require('progress');
+      progressBar = new ProgressBar(`Downloading ${browser} ${playwright._revision} - ${toMegabytes(totalBytes)} [:bar] :percent :etas `, {
+        complete: '=',
+        incomplete: ' ',
+        width: 20,
+        total: totalBytes,
+      });
+    }
+    const delta = downloadedBytes - lastDownloadedBytes;
+    lastDownloadedBytes = downloadedBytes;
+    progressBar.tick(delta);
+  }
+
+  const fetcher = playwright._createBrowserFetcher();
+  const revisionInfo = fetcher.revisionInfo();
+  // Do nothing if the revision is already downloaded.
+  if (revisionInfo.local)
+    return revisionInfo;
+  await fetcher.download(revisionInfo.revision, onProgress);
+  logPolitely(`${browser} downloaded to ${revisionInfo.folderPath}`);
+  return revisionInfo;
+}
+
+
+function toMegabytes(bytes) {
+  const mb = bytes / 1024 / 1024;
+  return `${Math.round(mb * 10) / 10} Mb`;
+}
+
+function logPolitely(toBeLogged) {
+  const logLevel = process.env.npm_config_loglevel;
+  const logLevelDisplay = ['silent', 'error', 'warn'].indexOf(logLevel) > -1;
+
+  if (!logLevelDisplay)
+    console.log(toBeLogged);
+}
+
+module.exports = {downloadBrowser};
diff --git a/install-development.js b/install-development.js
index b1c550bad6..fa1cfee176 100644
--- a/install-development.js
+++ b/install-development.js
@@ -18,78 +18,46 @@
  // This file is only run when someone clones the github repo for development
 
 try {
+  console.log('Building playwright...');
   require('child_process').execSync('npm run build', {
     stdio: 'ignore'
   });
 } catch (e) {
 }
+const {downloadBrowser} = require('./download-browser');
 
 (async function() {
   const protocolGenerator = require('./utils/protocol-types-generator');
   try {
-    const chromeRevision = await downloadBrowser('chromium', require('./index').chromium);
+    const chromeRevision = await downloadAndCleanup('chromium');
     await protocolGenerator.generateChromiunProtocol(chromeRevision);
   } catch (e) {
     console.warn(e.message);
   }
 
   try {
-    const firefoxRevision = await downloadBrowser('firefox', require('./index').firefox);
+    const firefoxRevision = await downloadAndCleanup('firefox');
     await protocolGenerator.generateFirefoxProtocol(firefoxRevision);
   } catch (e) {
     console.warn(e.message);
   }
 
   try {
-    const webkitRevision = await downloadBrowser('webkit', require('./index').webkit);
+    const webkitRevision = await downloadAndCleanup('webkit');
     await protocolGenerator.generateWebKitProtocol(webkitRevision);
   } catch (e) {
     console.warn(e.message);
   }
 })();
 
-async function downloadBrowser(browser, playwright) {
-  let progressBar = null;
-  let lastDownloadedBytes = 0;
-  function onProgress(downloadedBytes, totalBytes) {
-    if (!progressBar) {
-      const ProgressBar = require('progress');
-      progressBar = new ProgressBar(`Downloading ${browser} ${playwright._revision} - ${toMegabytes(totalBytes)} [:bar] :percent :etas `, {
-        complete: '=',
-        incomplete: ' ',
-        width: 20,
-        total: totalBytes,
-      });
-    }
-    const delta = downloadedBytes - lastDownloadedBytes;
-    lastDownloadedBytes = downloadedBytes;
-    progressBar.tick(delta);
-  }
+async function downloadAndCleanup(browser) {
+  const revisionInfo = await downloadBrowser(browser);
 
-  const fetcher = playwright._createBrowserFetcher();
-  const revisionInfo = fetcher.revisionInfo();
-  // Do nothing if the revision is already downloaded.
-  if (revisionInfo.local)
-    return revisionInfo;
-  await fetcher.download(revisionInfo.revision, onProgress);
-  logPolitely(`${browser} downloaded to ${revisionInfo.folderPath}`);
-  const localRevisions = await fetcher.localRevisions();
   // Remove previous revisions.
+  const playwright = require('.')[browser];
+  const fetcher = playwright._createBrowserFetcher();
   const cleanupOldVersions = localRevisions.filter(revision => revision !== revisionInfo.revision).map(revision => fetcher.remove(revision));
   await Promise.all([...cleanupOldVersions]);
+
   return revisionInfo;
 }
-
-function toMegabytes(bytes) {
-  const mb = bytes / 1024 / 1024;
-  return `${Math.round(mb * 10) / 10} Mb`;
-}
-
-function logPolitely(toBeLogged) {
-  const logLevel = process.env.npm_config_loglevel;
-  const logLevelDisplay = ['silent', 'error', 'warn'].indexOf(logLevel) > -1;
-
-  if (!logLevelDisplay)
-    console.log(toBeLogged);
-}
-
diff --git a/packages/playwright-chromium/index.js b/packages/playwright-chromium/index.js
index 3d5458a3ce..bfdbac7fd0 100644
--- a/packages/playwright-chromium/index.js
+++ b/packages/playwright-chromium/index.js
@@ -1 +1,16 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * 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 = require('playwright-core').chromium;
diff --git a/packages/playwright-chromium/install.js b/packages/playwright-chromium/install.js
index b6c9bac31b..2bf7a0aadc 100644
--- a/packages/playwright-chromium/install.js
+++ b/packages/playwright-chromium/install.js
@@ -1,39 +1,17 @@
-downloadBrowser('chromium', require('./index').chromium);
-
-async function downloadBrowser(browser, playwright) {
-  let progressBar = null;
-  let lastDownloadedBytes = 0;
-  function onProgress(downloadedBytes, totalBytes) {
-    if (!progressBar) {
-      const ProgressBar = require('progress');
-      progressBar = new ProgressBar(`Downloading ${browser} ${playwright._revision} - ${toMegabytes(totalBytes)} [:bar] :percent :etas `, {
-        complete: '=',
-        incomplete: ' ',
-        width: 20,
-        total: totalBytes,
-      });
-    }
-    const delta = downloadedBytes - lastDownloadedBytes;
-    lastDownloadedBytes = downloadedBytes;
-    progressBar.tick(delta);
-  }
-
-  const fetcher = playwright._createBrowserFetcher();
-  const revisionInfo = fetcher.revisionInfo();
-  await fetcher.download(revisionInfo.revision, onProgress);
-  logPolitely(`${browser} downloaded to ${revisionInfo.folderPath}`);
-}
-
-function toMegabytes(bytes) {
-  const mb = bytes / 1024 / 1024;
-  return `${Math.round(mb * 10) / 10} Mb`;
-}
-
-function logPolitely(toBeLogged) {
-  const logLevel = process.env.npm_config_loglevel;
-  const logLevelDisplay = ['silent', 'error', 'warn'].indexOf(logLevel) > -1;
-
-  if (!logLevelDisplay)
-    console.log(toBeLogged);
-}
-
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * 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 {downloadBrowser} = require('playwright-core/download-browser');
+downloadBrowser('chromium');
diff --git a/packages/playwright-chromium/package.json b/packages/playwright-chromium/package.json
index ac8b2111c5..24a449b882 100644
--- a/packages/playwright-chromium/package.json
+++ b/packages/playwright-chromium/package.json
@@ -1,7 +1,7 @@
 {
   "name": "playwright-chromium",
   "version": "0.9.17-post",
-  "description": "A high-level API to automate web browsers",
+  "description": "A high-level API to automate Chromium",
   "repository": "github:Microsoft/playwright",
   "main": "index.js",
   "scripts": {
diff --git a/packages/playwright-firefox/index.js b/packages/playwright-firefox/index.js
index 11d23826de..0cf5880f50 100644
--- a/packages/playwright-firefox/index.js
+++ b/packages/playwright-firefox/index.js
@@ -1 +1,16 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * 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 = require('playwright-core').firefox;
diff --git a/packages/playwright-firefox/install.js b/packages/playwright-firefox/install.js
index 0a2b6b13d6..62f901040a 100644
--- a/packages/playwright-firefox/install.js
+++ b/packages/playwright-firefox/install.js
@@ -1,39 +1,17 @@
-downloadBrowser('firefox', require('./index').firefox);
-
-async function downloadBrowser(browser, playwright) {
-  let progressBar = null;
-  let lastDownloadedBytes = 0;
-  function onProgress(downloadedBytes, totalBytes) {
-    if (!progressBar) {
-      const ProgressBar = require('progress');
-      progressBar = new ProgressBar(`Downloading ${browser} ${playwright._revision} - ${toMegabytes(totalBytes)} [:bar] :percent :etas `, {
-        complete: '=',
-        incomplete: ' ',
-        width: 20,
-        total: totalBytes,
-      });
-    }
-    const delta = downloadedBytes - lastDownloadedBytes;
-    lastDownloadedBytes = downloadedBytes;
-    progressBar.tick(delta);
-  }
-
-  const fetcher = playwright._createBrowserFetcher();
-  const revisionInfo = fetcher.revisionInfo();
-  await fetcher.download(revisionInfo.revision, onProgress);
-  logPolitely(`${browser} downloaded to ${revisionInfo.folderPath}`);
-}
-
-function toMegabytes(bytes) {
-  const mb = bytes / 1024 / 1024;
-  return `${Math.round(mb * 10) / 10} Mb`;
-}
-
-function logPolitely(toBeLogged) {
-  const logLevel = process.env.npm_config_loglevel;
-  const logLevelDisplay = ['silent', 'error', 'warn'].indexOf(logLevel) > -1;
-
-  if (!logLevelDisplay)
-    console.log(toBeLogged);
-}
-
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * 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 {downloadBrowser} = require('playwright-core/download-browser');
+downloadBrowser('firefox');
diff --git a/packages/playwright-firefox/package.json b/packages/playwright-firefox/package.json
index 88c9969bc1..0ca99078f7 100644
--- a/packages/playwright-firefox/package.json
+++ b/packages/playwright-firefox/package.json
@@ -1,7 +1,7 @@
 {
   "name": "playwright-firefox",
   "version": "0.9.17-post",
-  "description": "A high-level API to automate web browsers",
+  "description": "A high-level API to automate Firefox",
   "repository": "github:Microsoft/playwright",
   "main": "index.js",
   "scripts": {
diff --git a/packages/playwright-webkit/index.js b/packages/playwright-webkit/index.js
index fc57e941a4..03f81e63a6 100644
--- a/packages/playwright-webkit/index.js
+++ b/packages/playwright-webkit/index.js
@@ -1 +1,16 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * 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 = require('playwright-core').webkit;
diff --git a/packages/playwright-webkit/install.js b/packages/playwright-webkit/install.js
index f6a3fbba3c..f289ab867f 100644
--- a/packages/playwright-webkit/install.js
+++ b/packages/playwright-webkit/install.js
@@ -1,39 +1,17 @@
-downloadBrowser('webkit', require('./index').webkit);
-
-async function downloadBrowser(browser, playwright) {
-  let progressBar = null;
-  let lastDownloadedBytes = 0;
-  function onProgress(downloadedBytes, totalBytes) {
-    if (!progressBar) {
-      const ProgressBar = require('progress');
-      progressBar = new ProgressBar(`Downloading ${browser} ${playwright._revision} - ${toMegabytes(totalBytes)} [:bar] :percent :etas `, {
-        complete: '=',
-        incomplete: ' ',
-        width: 20,
-        total: totalBytes,
-      });
-    }
-    const delta = downloadedBytes - lastDownloadedBytes;
-    lastDownloadedBytes = downloadedBytes;
-    progressBar.tick(delta);
-  }
-
-  const fetcher = playwright._createBrowserFetcher();
-  const revisionInfo = fetcher.revisionInfo();
-  await fetcher.download(revisionInfo.revision, onProgress);
-  logPolitely(`${browser} downloaded to ${revisionInfo.folderPath}`);
-}
-
-function toMegabytes(bytes) {
-  const mb = bytes / 1024 / 1024;
-  return `${Math.round(mb * 10) / 10} Mb`;
-}
-
-function logPolitely(toBeLogged) {
-  const logLevel = process.env.npm_config_loglevel;
-  const logLevelDisplay = ['silent', 'error', 'warn'].indexOf(logLevel) > -1;
-
-  if (!logLevelDisplay)
-    console.log(toBeLogged);
-}
-
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * 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 {downloadBrowser} = require('playwright-core/download-browser');
+downloadBrowser('webkit');
diff --git a/packages/playwright-webkit/package.json b/packages/playwright-webkit/package.json
index 2062efee92..932b030ef2 100644
--- a/packages/playwright-webkit/package.json
+++ b/packages/playwright-webkit/package.json
@@ -1,7 +1,7 @@
 {
   "name": "playwright-webkit",
   "version": "0.9.17-post",
-  "description": "A high-level API to automate web browsers",
+  "description": "A high-level API to automate WebKit",
   "repository": "github:Microsoft/playwright",
   "main": "index.js",
   "scripts": {
diff --git a/packages/playwright/install.js b/packages/playwright/install.js
index 171ff7e2b3..08e34d9585 100644
--- a/packages/playwright/install.js
+++ b/packages/playwright/install.js
@@ -1,2 +1,17 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * 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.
+ */
 console.error('This package, "playwright", is a placeholder. Please install "playwright-chromium", "playwright-firefox", or "playwright-webkit" to use playwright.');
-process.exit(1);
\ No newline at end of file
+process.exit(1);