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Doqment

github.com/shivaprsd/doqment Browser Extensions Open-source projectOpen source

Doqment combines the Mozilla HTML5 PDF viewer with an add-on for reader mode.

Visit Doqment 24 alternatives
github.com/shivaprsd/doqment
Doqment homepage screenshot

About Doqment

Doqment is a custom build of Mozilla's PDF.js viewer, packaged as a browser extension. It adds the doq reader mode add-on, which changes the colors of a PDF, and it is distributed as open source code on GitHub.

The extension also adds Auto-track Document Outline, Smart Zoom for text, and a Show/Hide toolbar option intended to save space and assist reading on smaller devices. In Firefox, it replaces the built-in PDF viewer as the default. In Chrome and Chromium, it runs alongside the native viewer and adds a context menu item and toolbar button for opening PDFs. Firefox has limits compared with its built-in viewer: local files cannot be opened directly through file: URLs, the Find bar cannot search PDF text, and the address bar shows an extension URL. In Chromium, file: URLs work only if the user grants access in the extension settings.

Key features

  • Changes PDF colors through the doq reader mode add-on
  • Auto-tracks the document outline
  • Smart Zoom for text
  • Show/Hide toolbar to save space on smaller devices
  • Opens PDFs in Chrome and Chromium through a context menu and toolbar button
  • Options page for viewer and reader mode preferences
Best for: Readers who view PDFs in a browser and want to change page colors, and developers who want a starting point for their own PDF.js extension.
Good for
  • Open source under the MIT license
  • Can be used as a boilerplate for other PDF.js add-ons
  • Works in both Firefox and Chrome or Chromium
Watch out for
  • In Firefox, the integrated Find bar cannot search text in PDFs
  • In Firefox, local files cannot be opened directly through file: URLs
  • In Chromium, links that redirect cannot be opened through the context menu

Doqment at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Open source
Yes · Source code
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026
open sourcebrowser extensionchrome extensionsdark mode

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Doqment FAQ

Where can the extension be installed from?
The latest release can be installed from AMO or the Chrome Web Store, or downloaded from the project's Releases page.
How can local PDF files be opened?
In Firefox, open the extension's viewer in a tab and use its interface to open the file, or use the provided toolbar button. In Chromium, local files can be opened only if the user grants file access in the extension settings.
Does it replace the built-in PDF viewer?
In Firefox, it replaces the built-in PDF.js viewer as the default PDF viewer, and the project recommends disabling the built-in viewer's action for PDFs. In Chrome and Chromium, it runs alongside the native viewer.
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Listing maintained by Chris McClure and the WebIndexly editors · Updated Oct 13, 2026 · How we rank