Troubleshooting Firefox
For as many years as PDF has been popular, I've always hated viewing them within the browser. So on all the systems I use, I choose to disable the plug-in and have the PDF saved to my desktop instead. Thus it was a little irritating to see that Firefox stopped downloading PDFs correctly and just hung as it finished the download. I finally had a chance take a look and started by reinstalling Firefox. This didn't make any difference, so I dug a little deeper and backed up the profile. To find your profile, open Windows Explorer and type the following in the address bar and hit Enter:
%appdata%\MozillaFrom there, I'd suggest renaming the Firefox folder so you have your bookmarks and settings backed up. Then when you launch Firefox, it will generate a new profile folder:
%appdata%\Mozilla\Firefox\Profiles\xxxxxxxx.defaultOnce that's done you can reapply your settings (in this case disabling the PDF plug-in). Just a note of caution: make sure Firefox is closed before you attempt moving your bookmarks.html file from your old profile. Otherwise Firefox will delete it and use its last backup (the default bookmarks.bak in the new profile) once the program has been closed.