Chromium UA but pdfViewerEnabled is false

br.no_pdfviewer  ·  corroborates

What it catches

Chrome ships a PDF viewer; headless can lack it. DESKTOP-only: mobile Chrome has no built-in PDF viewer (pdfViewerEnabled=false on every real Android Chrome), so the collector gates chrome_no_pdfviewer to non-mobile UAs to avoid false-firing on real mobile users (calibration FP 4.2%->1.1%). Corroborating-only.

Signals it reads

browser.chrome_no_pdfviewer

How it fires

present

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