Adobe Create PDF extension is no longer available for Firefox because Firefox has stopped supporting NAPI. I would like Adobe to develop a replacement for the Create PDF extension. It did a much better job of creating a PDF from a web page than Print to Adobe does. It also allowed the output to be added to an existing PDF file. This was very useful when you had several web pages that were essentially part of one subject or transaction. It allowed you skip saving the pages as individual files and then combining them as a separate step. Please bring back the Create PDF extension functionality!