Detect PDF.js
PluginView detects PDF.js, a Miscellaneous, by evaluating javascript globals, dom selectors, html markup, url patterns on publicly reachable pages. Illustrative public indicators associated with PDF.js include PDFJS, PDFJS.version: ., _pdfjsCompatibilityChecked. Full fingerprint rules remain proprietary; this page summarizes the signal classes and example indicators used for identification.
Detection looks at javascript globals, dom selectors, html markup, url patterns across 8 fingerprint rules among the site's public responses.
Websites using PDF.js
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Signal classes
PluginView evaluates public page signals in these classes when identifying PDF.js. Individual fingerprint rule bodies are proprietary and are not published.
- JavaScript globals
- DOM selectors
- HTML markup
- URL patterns
Example public indicators for PDF.js
Illustrative indicators derived from public catalog metadata for PDF.js. A live scan may match additional proprietary rules beyond these examples.
- PDFJS
- PDFJS.version: .
- _pdfjsCompatibilityChecked
- pdfjsDistBuildPdf.version: .
- pdfjsLib.version: .
- div
- </div> *<!-- outerContainer --> *<div *id="printContainer"></div>
- web/viewer.html?file=.pdf
What a detection means
- Establishes
- One or more public signals on the scanned page matched a known PDF.js signature (8 rules) at the time of the scan.
- Does not establish
- A sitewide install of PDF.js, an active vendor contract, exclusive use, or that PDF.js is still in place today.
How to check a site for PDF.js
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest PDF.js signals.
- 2. PluginView reads only public responses (javascript globals, dom selectors, html markup) and scores them against the PDF.js signature set (8 rules).
- 3. Review the confidence score and text explanation for PDF.js on the results page.
FAQ: detecting PDF.js
- Can PluginView detect PDF.js without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for PDF.js — typically javascript globals, dom selectors, html markup, url patterns. It does not bypass authentication or paywalls.
- What category is PDF.js?
- PDF.js is classified under Miscellaneous in the PluginView directory.
- How many fingerprint rules cover PDF.js?
- This reference currently tracks 8 fingerprint rules across javascript globals, dom selectors, html markup, url patterns. Individual rule bodies are proprietary and are not published.
- What public signals suggest a site uses PDF.js?
- Illustrative public indicators for PDF.js include PDFJS; PDFJS.version: .; _pdfjsCompatibilityChecked. A live scan may match additional proprietary rules beyond these examples.
