[solved] open files with system default

CitationUser

Edit: system default settings are working correctly with Zotero. My system configuration has changed with a recent 3rd party application.

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outdated information:

Zotero has a setting to open files with system default. This allows you to open files with the system default application for PDF.

Any file in Zotero opens with PDF application, regardless of type. I would like to open plain text and markdown files from Zotero with system default, too. Instead, what happens is that these files are opened with PDF application.

I am using Zotero 5.0.96 on Linux PoPOS!

thank you in advance for your attention.