Firefox 15 tip: enable the built-in PDF viewer

[2012-08-29] browser, firefox, computers, pdf
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Firefox 15 has been released. It comes with a built-in PDF viewer that is written in pure JavaScript (no plugins!) whose name is “pdf.js” [1]. To enable it,

  • go to about:config,
  • set pdfjs.disabled to false (double negation FTW!),
  • restart Firefox.
Afterwards, all PDFs will be displayed inside Firefox and not be opened in external applications, any more.

Source: “What's New in Firefox 15” by Craig Buckler for SitePoint.


  1. PDF.js: display PDF files in your browser, without native code

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