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EXT_sRGB

WebGL Extension

WebGL1 Fingerprinting Signal
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What is EXT_sRGB?

The EXT_sRGB extension is part of the WebGL API and adds sRGB support to textures and framebuffers. Provides constants SRGB_EXT, SRGB_ALPHA_EXT, SRGB8_ALPHA8_EXT, and FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT for textures/framebuffers in sRGB color space, ensuring accurate color representation. Available in WebGL1 only; in WebGL2, sRGB formats are available by default without the _EXT 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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