![](https://addons.mozilla.org/static-server/img/addon-icons/default-64.d144b50f2bb8.png)
PDF Previewer
Add-on stats
- webRequest
- webRequestBlocking
- <all_urls>
Other platforms
Add-on summary
PDF Previewer transforms your PDF viewing experience by enabling instant in-browser previews for all PDF files. No more dealing with pesky "Save as" dialogs or automatic downloads. With PDF Previewer, PDFs open seamlessly within your browser, allowing you to preview and read them effortlessly. Need to save the PDF? Just press CTRL+S (or CMD+S) after viewing.
For optimal functionality, ensure that your Firefox > Preferences > Applications > PDF setting is set to "Preview in Firefox." Encountering downloaded PDFs? Share the URL with our support email address, and we'll investigate the issue.
Add-on safety
Risk impact
PDF Previewer is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install PDF Previewer if you trust the publisher.
Risk likelihood
PDF Previewer may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.