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CSP Blocking PDF Printing in EO.WebBrowser Options
Virgile Wicky
Posted: Tuesday, April 7, 2026 5:35:35 AM
Rank: Newbie
Groups: Member

Joined: 10/6/2016
Posts: 8
Hi Support Team,

we are using EO.WebBrowser (version 25.1.35.0) in our application.
Within our web application, PDFs are rendered using embedpdf for React and displayed correctly. However, when users attempt to print these PDFs, the operation fails due to a Content Security Policy (CSP) violation, which appears to be blocked by the embedded browser.

Could you please advise whether this is a known limitation or configuration issue in EO.WebBrowser?
Additionally, are there recommended settings or workarounds to allow PDF printing in this scenario?
Thank you in advance for your support.
Kind regards,
Virgile
eo_support
Posted: Wednesday, April 8, 2026 8:29:38 AM
Rank: Administration
Groups: Administration

Joined: 5/27/2007
Posts: 24,486
Hi,

How do you print the PDF file? We tested build 25.1.35 with the following steps and it appears to work:

1. Run TabbedBrowser sample application;
2. Load embedpdf demo page: https://app.embedpdf.com/
3. Click the "=" button for the PDF Viewer, then select "Print";

This successfully sends the PDF to the printer. So your steps must be different. Please let us know the details of your steps so we can test here again.

Thanks!


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