cefsharp 126.2.7 disable-pdf-extension Invalid cefsharp 125.0.210 disable-pdf-extension normal

[yyjj7788]

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To Reproduce
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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
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Versions (please complete the following information):

• OS: [e.g. Windows 10, MacOS 13.2, Ubuntu 22.10]
• CEF Version: [e.g. 111.2.2]

Additional context
Does the problem reproduce with the cefclient or cefsimple sample application at the same version?

Does the problem reproduce with Google Chrome at the same version?

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[magreenblatt]

The disable-pdf-extension flag is not supported with Chrome bootstrap.

[chriscurtismozenda]

Thank you for confirming @magreenblatt. Are there any plans to implement this behavior in the future for the Chrome bootstrap? Any suitable workarounds when using the Chrome bootstrap that you are aware of?

[chriscurtismozenda]

Looks like this setting is what is needed in Chrome:
chrome://settings/content/pdfDocuments

If this is set to "Download PDFs" then the viewer is not invoked in a similar way and the PDFs go through the download manager. Is there a way to set this programmatically in CEF?

[chriscurtismozenda]

Looks like I was able to change this behavior with the following preference:

CfxValue pdfValue = CfxValue.Create();

pdfValue.SetBool(true);

bool success = this.Browser.Host.RequestContext.SetPreference("plugins.always_open_pdf_externally", pdfValue, out error);