Webpage/PDF Launching in New Tab Rather than New Window

Cappie, 

I have experienced what you are talking about with a resource taking over a tab.  What type of resource is it, a word doc or PDF? What browser are you using? If I remember correctly when I used Chrome, and a document was launched from a module in the LMS it took over my storyline tab.  I think Microsoft Edge worked better, but you may want to test if you have not done so already. What LMS do you have?  At the end of the day, I think I had to find another way for people to access the resource.