PDF automatically opens/downloads

[Zyles]

I can't get this to work. Every PDF I try to embed just opens up in full screen or it prompts me to "save as" on mount.

Example PDF:
https://css4.pub/2015/icelandic/dictionary.pdf

What is causing this?

[pipwerks]

Sometimes the server has Content-Disposition header set to "attachment" when serving the PDF. If this is the case, the PDF will always download and will never display within the scope of the page.

You haven't provided any code examples, details of the operating system, browser, or other environment, so 🤷🏻‍♂️