PDF Firefox problem

If PDF files won't open in Firefox 

Do you get the following error message when you try to open PDF files in Mozilla Firefox?

 "Cannot use Adobe Reader to view PDF in your web browser. Reader will now exit. Please exit your browser and try again." 

Do you not want to subscribe to the cheeky websites that tempt you to an answer but make you pay and click on pop-up ads to view it? 

Here's what to do.

  •  If you don't always have this problem it could be the file that's problematic - check it's not too large or at an invalid address
  • If no PDFs will open in your browser, try removing all old versions of Acrobat, re-starting the computer, then re-installing the latest version. This did the job for me.


If that doesn't work, try looking at Adobe's helpful technical support page.