Quick wins for a faster PC:
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Create an isolated context and page
This example launches Puppeteer, creates a non-default context, opens a page inside it, and cleans up both resources it owns. The current Puppeteer API reference displays version 25.12.0; check your installed version if an API call differs.
import puppeteer from 'puppeteer';
const browser = await puppeteer.launch();
let context;
try {
// Fresh context with cookies and cache separate from other contexts.
context = await browser.createBrowserContext();
const page = await context.newPage();
await page.goto('https://example.com');
// Work with this page and any popups it opens.
} finally {
if (context) {
await context.close();
}
await browser.close();
}createBrowserContext() returns a promise, so await it. The official method reference says the new context does not share cookies or cache with other browser contexts. Puppeteer’s API reference also describes storage isolation including cookies and localStorage.
What the isolation covers
- Separate browser state: cookies and cache are not shared across browser contexts; Puppeteer also identifies localStorage as isolated storage.
- Pages and popups stay together: a popup opened by a page, for example through
window.open(), belongs to that page’s context. - Not a separate browser process: contexts are separate contexts inside a browser. The documented storage separation is not a claim of OS-level sandboxing or complete security isolation.
Put every page in the intended context
Call context.newPage() for pages that need the isolated state. Calling browser.newPage() instead creates a page in the browser’s default context, so that page will not use the newly created context.
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The default context is available through browser.defaultBrowserContext(), but it cannot be closed. Use createBrowserContext() when you need fresh, disposable state. See the default context reference.
Close the context you created
await context.close() closes that context and all pages associated with it, including its popups. The BrowserContext reference documents this cleanup behavior.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
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If your code receives a Browser instance created elsewhere, close the context your code created, but do not close the browser unless your code owns its lifecycle. browser.close() closes the browser and its pages; browser.disconnect() disconnects Puppeteer while leaving the browser process running. See the Browser API reference.
Optional context settings
createBrowserContext() accepts optional BrowserContextOptions. The current reference lists downloadBehavior, proxyBypassList, and proxyServer. The proxy option can specify a proxy for requests; username and password can be set with Page.authenticate. These settings are unnecessary for basic isolation, and support can vary by Puppeteer version and browser. Consult the BrowserContextOptions reference for details.
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Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
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- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Common mistakes and fixes
- Calling
createIncognitoBrowserContext(): the current method iscreateBrowserContext(). Puppeteer records the old name’s breaking rename in version 22.0.0, dated 2024-02-05, in its changelog. - Opening the page on
browser: usecontext.newPage(), notbrowser.newPage(), when the page needs the isolated context. - Closing the wrong object: close the created context to dispose of its pages. Close the browser only if your code owns the launched browser.
- Closing the default context: it cannot be closed. Create a separate context when you need a disposable one.
- Assuming process-level security: context separation is documented as storage isolation, not a separate OS process or complete security boundary.
Or skip the browser setup
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Quick Recap
Best Value
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- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
