PDF files in Firefox

I download or view a fair number of PDFs. I must have checked the “Take this action every time” box when I downloaded one. Now it does not give me the choice, the only thing I can do is download. How do I get back the choice to open in Adobe or download?

I use Firefox 52.9 in Windows XP.


It’s under Options and then Applications from the menu at top right.

I see it under Options -> General -> Applications

Oh, yeah, there it is.