> ## Documentation Index
> Fetch the complete documentation index at: https://tbd-6fc993ce-hypeship-site-difficulty-index.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# FAQ

> Frequently asked questions about Kernel browsers

## Browser spin-up time

Non-standard configuration can affect browser spin-up time. Settings like non-default [viewport sizing](/browsers/viewport), [extensions](/browsers/extensions), or [Profiles](/auth/profiles) may increase the time it takes for a browser to become ready.

**Standard configuration** includes:

* Headful and headless browsers
* Stealth mode both enabled and disabled

If you're experiencing slower-than-expected browser creation times, review your configuration to identify any non-standard settings that may be contributing to the delay.

## Connection notes

* **CDP connections** are meant to be long-lived but may eventually close. Websocket connections typically can remain active for up to 1 hour, after which they may close automatically. Browser sessions themselves are unaffected—reconnect to the same `cdp_ws_url` to continue using the browser.
* Browsers persist independently of CDP. Depending on your timeout configuration, it will continue running even if the CDP connection closes. You can reconnect to the same `cdp_ws_url` if you're unexpectedly disconnected.
* We recommend implementing reconnect logic, as network interruptions or lifecycle events can cause CDP sessions to close. Detect disconnects and automatically re-establish a CDP connection when this occurs.

## Site difficulty index

A rough grouping of sites by how much friction we see when running stealth Kernel browsers against the public landing page. This list is incomplete and will grow over time.

### Hard — significant friction observed

Most or all sessions were blocked or challenged.

* Yelp
* Glassdoor
* Indeed
* TripAdvisor

### Light — partial friction observed

Some sessions were blocked or challenged.

* Yellow Pages
* Zillow

### Clear — no blocks observed at this layer

All sessions returned a usable page. These sites still deploy bot detection — login flows, deep navigation, and high-volume scraping behave very differently — but the public landing page renders cleanly.

* Airbnb
* Amazon
* Booking.com
* Cars.com
* Crunchbase
* eBay
* Etsy
* Facebook
* Facebook Marketplace
* GitHub
* Google Maps
* Google Search
* IMDb
* Instagram
* LinkedIn
* Medium
* Pinterest
* Reddit
* Shopify storefronts (Gymshark)
* Target
* TikTok
* Walmart
* Wikipedia
* X (Twitter)
* Yahoo Finance
* YouTube

<Info>
  Hitting friction on a site that's listed under Clear? Check your [proxy type](/browsers/bot-detection/overview#choosing-a-proxy-type) and confirm you're not running headless — those are the two most common causes of unexpected detection.
</Info>