Firefox PDF Viewer (PDF.js) vs StumbleUpon
A side-by-side look at Firefox PDF Viewer (PDF.js) and StumbleUpon. For an in-depth review of either product, follow the links below.
Firefox PDF Viewer (PDF.js)
Web Browsers
Firefox PDF Viewer (PDF.js) is an open source PDF viewer that is built into Firefox. It allows you to view PDFs directly in the browser without needing an external plugin.
open-sourcepdfviewerfirefoxbrowser-plugin
StumbleUpon
Social & Communications
StumbleUpon is a web discovery platform that recommends web content to its users. It uses collaborative filtering to analyze user ratings and preferences to suggest interesting websites and articles that match the user's interests.
web-discoverycontent-recommendationcollaborative-filtering
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