Kindly follow the following steps:- 1. On the Web page you want to save, select Menu > Save as PDF. 2. The Android downloader notification appears and notifies you when it is finished. 3. To open the PDF, tap Menu > Downloads. 4. Your Downloads screen appears with the PDF listed, tap the PDF to open it with the PDF reader installed on your Android phone. It’s worth noting that some Android phones include a PDF reader that is not compatible with PDFs created in Firefox. Search for and download Adobe Reader from the Google Play store if you are having problems reading PDFs created with Firefox. Do let us know if it solved your problem.