PDFs open in a new window?

I have PDF"s on my site for public view. These PDF"s automatically download on my computer instead of opening in a new window. On my internet browser (Google Chrome or IE) the files will auto download. On my IOS mobile phone they open in a new window.   Is there a way to have the PDF open in a new window?

My community is on Telligent 11

I do not want to have the PDF be available by the file viewer, this is not the experience we'd like.

I've changed settings in my browsers and this did not change the end user experience.