How can I make sure that PDFs open properly in Firefox? (Windows users)

If you've updated or repaired Adobe, it may no longer be the default application for opening PDF files in Firefox. To ensure that Adobe is being used with Firefox, simply follow these steps:

1. Click TOOLS and then OPTIONS.
   
   
   
   
2. Click APPLICATIONS and then make sure that Use Adobe Acrobat is selected as the action for PDFs. That's it!