(Pictured) Firefox 78 Start can be set as the default PDF reader on Windows

Starting with Firefox 78, the browser’s built-in PDF reader (PDF.js) can be set as the default PDF reader on Windows. Mozilla has now made the necessary modifications to the browser installer to use Firefox as the default PDF file handler on Windows.

(Pictured) Firefox 78 Start can be set as the default PDF reader on Windows

Like Chrome and Microsoft Edge, Mozilla Firefox has a built-in PDF browser where you can read PDF files. When you install Edge or other Chromium-based browsers (such as Vivaldi, Opera, and Brave), they can all serve as the default PDF readers on Windows systems. However, in the Firefox browser, reading most PDF files is not supported without installing a plug-in.

(Pictured) Firefox 78 Start can be set as the default PDF reader on Windows

However, this issue is addressed in the latest Firefox installation. The installer can register supported default file associations on Windows. If you want to use Firefox as your default PDF reader in your Windows 10 system, here’s how

1. Make sure you’re running Firefox 78 or later, click Start, Settings, “App” and “Default App.”

2. Scroll down and select “Select default application by file type”

3. Scroll down to find .pdf and click on the current default program icon.

4. In the “Select Apps” dialog box, select Firefox

5. Open any PDF file on your device and it will now open in the Firefox browser.

Currently, The PDF reader of Firefox browser offers features including:

Support for printing

Allow users to download PDF files and save them locally

Provide synod or full-screen mode

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