# PDFStream Viewer

> PDFStream Viewer is an extension that showcases all PDF files directly within the browser window, avoiding automatic downloads or "Save as" dialogs. Users can easily view PDFs and save them using CTRL+S (or CMD+S) after viewing.

Canonical page: [https://chrome-stats.com/d/pdfstream-viewer](https://chrome-stats.com/d/pdfstream-viewer)

## Overview

- **ID:** `pdfstream-viewer`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** TDTC
- **Category:** other
- **Daily users:** 2
- **Version:** 1.0.6
- **Last updated:** 2024-01-25
- **First published:** 2024-01-24
- **Size:** 28 KB
- **Data as of:** 2026-09-12
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/pdfstream-viewer/)

## Description

PDFStream Viewer is necessary with PDFStream Viewer; it ensures PDFs are presented directly in the browser window. Ensure your Firefox setting under Preferences > Applications > PDF is set to "Preview in Firefox" for optimal user experience.

## Rankings

- #69,230 — Overall
- #248 — viewer

## Permissions and access

### Permissions

- `webRequest`
- `webRequestBlocking`
- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/pdfstream-viewer)