Firefox PDF Viewer (PDF.js) vs Orion Viewer

A side-by-side look at Firefox PDF Viewer (PDF.js) and Orion Viewer. 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

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Orion Viewer

Photos & Graphics

Orion Viewer is a free open-source image viewer focused on speed and usability. It's lightweight with support for common raster image formats like JPEG, PNG, BMP, as well as RAW formats. Key features include basic image editing, exif data display, customizable themes, and customizable keyboard shortcuts.

image-viewerjpegpngbmprawexifthemesshortcuts

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