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OES_vertex_array_object

WebGL Extension

WebGL1 Fingerprinting Signal
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What is OES_vertex_array_object?

The OES_vertex_array_object extension is part of the WebGL API and provides vertex array objects (VAOs) which encapsulate vertex array states. Provides createVertexArrayOES(), deleteVertexArrayOES(), isVertexArrayOES(), and bindVertexArrayOES() methods for efficient vertex state management. Available in WebGL1 only; in WebGL2, this functionality is available by default without the OES_ suffix.

Read MDN Documentation

Browser Support

Checking Extension Support
This extension is part of the WebGL1 specification. Browser support varies based on:
  • Graphics card model and capabilities
  • GPU driver version
  • Browser version and vendor
  • Operating system

Usage in Web Scraping & Anti-Bot Bypass

Modern anti-bot systems verify WebGL extensions to detect automated browsers. Mismatches between GPU hardware and available extensions are strong bot signals.

What Anti-Bot Systems Check:
  • Extension availability: Does the reported GPU support these extensions?
  • Extension combinations: Are the extensions typical for this GPU model?
  • Consistency checks: Do reported extensions match other GPU signals?
  • Missing extensions: Are expected extensions for this GPU absent?
Scrapfly's Anti-Scraping Protection (ASP)
Scrapfly automatically manages WebGL fingerprint consistency, ensuring all extensions match the emulated GPU profile. This prevents detection by anti-bot systems that verify WebGL data.
Learn About ASP Bypass

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