Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I need to be able to use FDF's in PDF's and to do so I need to use Adobe Acrobat as Firefox's built-in PDF viewer doesn't FDF's. Problem is... that option is no longer appearing. "Use Adobe Acrobat (default)" appears as an option but not "Use Adobe Acrobat (in Firefox)".

Any ideas?

share|improve this question

Could you please confirm that Adobe Reader is installed in your PC and you've updated Firefox latest version!

enter image description here

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .