PDF Download Issues
File downloads that do not start or prompt you to save the file to your computer indicate a connection failure or the content is being blocked by your local network. Some hospitals and other facilities block certain file types from being downloaded. To resolve this problem, further action may be needed by contacting your network administrator. You may also need to make sure that your pop-up blocker is not affecting your ability to access the files.
About Pop-up windows:
Pop-up windows, or pop-ups, are windows that appear automatically without your permission. They vary in size but usually don't cover the whole screen. Some pop-ups open on top of the current Firefox window, while others appear underneath Firefox (pop-unders). Firefox allows you to control both pop-ups and pop-unders through the Content panel in the Preferences window. Pop-up blocking is turned on by default, so you don't have to worry about enabling it to prevent pop-ups from appearing in Firefox.
Blocking pop-ups may interfere with some websites: Some websites, including some banking sites, use pop-ups for important features. Blocking all pop-ups disables such features. To allow specific websites to use pop-ups, while still blocking all others, you can add those specific websites to the list of allowed sites.
Blocking pop-ups don't always work: Although Firefox blocks most pop-ups, some websites may show pop-ups using uncovered methods, even when they are blocked.
Learn more about pop-up blockers here.