I started to use Firefox recently, and I have a constant problem. Every time I want to open a PDF link I want to preview it in a tab instead of saving the file. I changed the parameter for the actions on PREFERENCES > APPLICATIONS The parameter for PDFs is on Preview in Firefox

I set in that way, but after a couple of days it always returns to the "save file option"

Any idea of what could be happening?

  • Argh, I remember this happening to me! I can't seem to remember how I fixed it! :( – Nonny Moose May 20 '17 at 1:34

[should have commented but didn't as I couldn't comment yet.]

Well that's odd, I wonder there's a third party program protecting or changing your preferences, or some addon doing the same. Check if there's anything as such.

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