Why Puppeteer-Extra’s solveRecaptchas() Is Not a Function
Fix Puppeteer-Extra's solveRecaptchas() TypeError by registering the plugin, using the right instance, and handling existing pages correctly.
Engineering
Puppeteer, Playwright, Selenium and headless Chrome, and what they take to run well.
Playwright CSS Visual Regression Testing
Build reliable Playwright CSS visual regression tests with stable baselines, animation controls, diff thresholds, CI setup, and troubleshooting.
Why Cypress Does Not Reflect Changes to the HTML Title
Learn why Cypress sees a stale HTML title, how cy.title() retries, and how to diagnose timing, navigation, and the Cypress 15.19.0 regression.
How to Run an MCP Server on Your Infrastructure
Deploy an MCP server locally or remotely with stdio or Streamable HTTP, then secure, containerize, scale, monitor, and upgrade it safely.
JavaScript Vulnerability Scanner: Detect Vulnerable Libraries
Learn how to scan npm dependencies, bundled browser libraries, and GitHub repositories for known JavaScript vulnerabilities.
Data Parsing: Techniques, Tools, and Scalable Web Data Extraction
Learn how to parse HTML, JSON, XML, and JavaScript-rendered pages, choose the right tools, and scale reliable, compliant extraction workflows.
Why Headless Browser Screenshots Fail and How to Fix Them
Fix blank, cropped, inconsistent headless browser screenshots by controlling viewport, readiness, lazy loading, animation, and runtime.
The Role of HTTP Cookies in Web Scraping
Learn how HTTP cookies preserve scraper sessions, how scope and expiry work, and how to send cookies safely with Python, cURL, and Node.js.
How to Prevent Wkhtmltoimage from Capturing Localhost and 127.0.0.1 URLs
Block loopback requests with network isolation; --disable-local-file-access protects files, not HTTP localhost or 127.0.0.1 URLs.
GPU Rendering for Website Screenshots
Learn when headless Chrome uses the GPU, how to enable it in CI, and how to verify rendering without assuming a speedup.
End-to-End Testing with Playwright
Install Playwright, write resilient browser workflows, choose coverage, run tests in CI, and debug failures with traces.
Why CasperJS Cannot Render Google reCAPTCHA
CasperJS relies on legacy PhantomJS or SlimerJS engines that cannot be relied on for today’s Google reCAPTCHA. Diagnose timing, keys, network and browser limits.
Why Headless Chrome Ignores System Proxies and How to Fix It
Headless Chrome does not use a separate proxy stack. Learn how effective launch arguments, PAC files, bypass rules and SOCKS DNS behavior determine routing.
How to Store Proxy Credentials Securely
Store proxy credentials in a managed secret vault, retrieve them at runtime with least privilege, and rotate them quickly after exposure.
Why PhantomJS Screenshots Differ Across Machines and How to Fix Them
PhantomJS screenshots vary with WebKit builds, fonts, viewport, timing and scaling. Use this diagnostic sequence to make captures reproducible.
How to Diagnose and Reduce High CPU Usage in Pyppeteer
Find whether Pyppeteer, Chromium, or the page is consuming CPU, then reduce workload safely with profiling, CDP metrics, and lifecycle fixes.
How to Crawl Websites at Scale with Puppeteer
A production guide to crawling JavaScript sites with Puppeteer: queues, concurrency, robots.txt, browser pools, retries, memory control, and observability.
How Headless Chrome Affects Selenium Tests Compared with Headed Mode
Learn what changes between headed and headless Selenium, how to configure Chrome reliably, and how to debug viewport, rendering, and CI failures.