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Technical Evaluation Framework: Vetting Puppeteer & Headless Automation Specialists

Puppeteer enables headless Chrome browser automation for scraping, automated testing, and PDF generation. Vetting requires evaluating stability, stealth, and resource management.

1. Browser Automation Architecture & Puppeteer

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  Headless Chrome Orchestration: Managing Chrome process lifecycles, page contexts, request interception, and network idle states.
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  Anti-Bot Navigation & Stealth: Implementing Puppeteer-Extra and stealth plugins to avoid detection on data extraction pipelines.
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  High-Fidelity PDF & Screenshot Generation: Configuring print media CSS, headers/footers, and pixel-perfect rendering for server-side PDF exports.

2. Buyer Diligence & Vetting Criteria

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   Process & Memory Management: Properly closing browser instances (browser.close()) and pages to prevent orphan Chrome processes from exhausting memory.
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   Resilient DOM Selectors: Using robust accessibility and attribute-based selectors rather than fragile, brittle auto-generated XPath strings.
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   Distributed Worker Architecture: Scaling browser automation horizontally using worker pools, Redis queues, and Dockerized browser containers.

3. Red Flags to Watch For

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  Orphan Zombie Chrome Processes: Failing to wrap browser operations in try/finally blocks, leaving hundreds of zombie Chrome processes running.
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  Hardcoded Arbitrary Sleep Timers: Using page.waitForTimeout() with arbitrary delays instead of deterministic event watchers (waitForSelector).
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  Ignoring Request Interception: Downloading heavy media files (images, fonts, stylesheets) during scraping tasks where only HTML/data is needed.