Opera and Opera GX include a built-in PDF viewer that allows users to open and view PDF files directly within the browser. While this feature is convenient for some users, many find it frustrating when downloaded PDF files automatically open immediately after the download completes.

If you prefer to download PDF files without automatically opening them, Opera and Opera GX provide several settings that can help you control this behavior. This guide explains multiple methods to stop PDF files from opening automatically after download and restore normal download behavior.

Why Do PDF Files Open Automatically?

PDF files may open automatically because:

• The browser is configured to open certain file types after downloading.
• Opera's built-in PDF viewer is enabled.
• Download preferences have been modified accidentally.
• Extensions are controlling PDF handling.
• Windows file association settings are forcing PDFs to open automatically.

Method 1: Disable "Open PDFs in Opera"

Step 1: Open Opera Settings

1. Launch Opera or Opera GX.
2. Click the Opera Menu in the top-left corner.
3. Select Settings.

Alternatively:

• Press Alt + P

Step 2: Search for PDF Settings

1. In Settings, use the search box.
2. Type:

PDF

3. Locate the PDF-related options.

Step 3: Configure PDF Behavior

If available, disable:

• Open PDF files in Opera
• Automatically open PDF documents

This forces PDFs to download instead of opening automatically.

Method 2: Check Download Settings

Open Downloads Page

1. Press:

Ctrl + J

2. Locate a recently downloaded PDF file.
3. Click the menu (three dots) next to the downloaded file.
4. If you see:

Always Open Files of This Type

make sure it is unchecked.

This setting often causes PDFs to open immediately after downloading.

Method 3: Reset Download Preferences

Sometimes Opera stores file-opening preferences internally.

Steps

1. Open:

opera://settings/downloads

2. Review all download-related settings.
3. Verify that no automatic opening options are enabled.
4. Restart the browser.

Method 4: Disable Built-In PDF Viewer

You can force Opera to download PDF files instead of displaying them.

Steps

1. Open Settings.
2. Search for:

PDF

3. Locate:

Download PDF files instead of automatically opening them

4. Enable this option.

Benefits:

• PDFs download directly.
• No automatic opening.
• Files remain stored in your Downloads folder.

Method 5: Check Extensions

Browser extensions can modify download behavior.

Steps

1. Open:

opera://extensions

2. Review installed extensions.

Look for:

• PDF tools
• Download managers
• Document viewers
• File handling utilities

3. Disable suspicious extensions.
4. Test PDF downloads again.

Method 6: Clear Opera Download History

Corrupted download preferences can sometimes cause unexpected behavior.

Steps

1. Press:

Ctrl + H

2. Open browsing data settings.
3. Clear:

• Download history
• Cached files

4. Restart Opera.

Method 7: Check Windows Default PDF Application

Sometimes the browser downloads correctly but Windows immediately opens the file.

Windows 10 / Windows 11

1. Open:

Settings → Apps → Default Apps

2. Search:

.pdf

3. Check the assigned application.

Common applications include:

• Adobe Acrobat Reader
• Microsoft Edge
• Foxit Reader
• Sumatra PDF

If a third-party utility is configured to monitor downloads, disable its auto-open feature.

Method 8: Reset Opera Settings

If nothing works, reset the browser.

Steps

1. Open:

opera://settings/reset

2. Choose:

Restore Settings to Their Original Defaults

3. Confirm.

This removes customized download behaviors.

Special Instructions for Opera GX

Opera GX uses the same Chromium engine as Opera, so PDF settings are nearly identical.

Open Settings Quickly

Press:

Alt + P

Search for:

PDF

Disable:

• Open PDFs in Opera
• Automatic PDF opening options

Then restart Opera GX.

Enterprise and Shared Computer Environments

For IT administrators managing multiple systems:

Recommended Configuration

• Disable PDF auto-opening.
• Force PDF downloads.
• Use Adobe Acrobat Reader or a dedicated PDF application.
• Disable unnecessary PDF extensions.
• Standardize browser settings across all user accounts.

This approach improves security and prevents accidental document exposure.

Troubleshooting Checklist

If PDFs still open automatically:

✓ Disable Opera PDF Viewer

✓ Disable "Always Open Files of This Type"

✓ Review Download Settings

✓ Disable Extensions

✓ Reset Opera Preferences

✓ Verify Windows PDF Associations

✓ Restart Browser

✓ Test with a new PDF download

Conclusion

Opera and Opera GX offer flexible PDF handling options, but accidental configuration changes can cause PDF files to open automatically after downloading. By adjusting PDF viewer settings, download preferences, and file associations, you can easily stop PDFs from opening automatically and ensure downloaded files remain saved in your Downloads folder until you choose to open them manually.

Following the methods in this guide will help restore normal download behavior and provide better control over PDF file management in both Opera and Opera GX browsers.