PDF.js

unknown393 eligible domainsmozilla.github.io
Broader database observations
Share of tracked domains0.2%
Avg confidence100%
30-day observation change+5

These statistics include detections outside the stricter public preview. Counts can exceed the qualifying domains above; they describe our coverage, not internet-wide market share.

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What is PDF.js?

PDF.js is a unknown technology. Currently detected on 393 quality-eligible websites in the Glympt index.

Official website: mozilla.github.io.

Recently detected on

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Estimated countries across broader detections

Includes observations below the public country preview’s confidence and quality thresholds. These are website geography signals, not verified business locations.

AT · 3BR · 12DE · 9ES · 9FR · 13GB · 9ID · 3IT · 12PL · 3US · 36

Related technologies

Co-detected in the broader database

Counts include broader stored detections, without the public preview’s quality filters. Co-detection describes an observation, not a recommendation or integration guarantee.

Frequently asked questions

How does Glympt detect PDF.js?

By scanning headers, HTML, JS globals, meta tags, and cookies. Detection is automated and non-intrusive.

What does the score measure?

The average detector score for PDF.js is 100/100. It measures matching evidence, not independently verified accuracy.

Can I export?

Yes. Pro and Business plans include CSV export with full filtering.

Refresh rate?

Observation dates are shown on each report. Refresh timing varies with crawler capacity; you can request a fresh scan from the dashboard.

Does this measure PDF.js market growth?

Our database recorded a net change of 5 observations in 30 days. New coverage and rescans affect this number; it is not a measure of market growth or migrations.

What is "confidence"?

A 0–100 detector score based on matching signals. Stronger evidence increases the score, but false positives and missed technologies remain possible.