Firefox download of files not working or not finishing for one user on one computer account but does for another on a separate account.
Firefox on mac osx with automatic updates for OS and Firefox up to date for over a year recently started producing failed downloads (probably between 9-13 and 9-14, aroun… (read more)
Firefox on mac osx with automatic updates for OS and Firefox up to date for over a year recently started producing failed downloads (probably between 9-13 and 9-14, around the time of the last Firefox update). What has been tried to fix this: everthing from the Mozilla help pages “What to do if you can't download or save files” asserted to be based on information from “Unable to save or download files (mozillaZine KB)” with the exception of dealing with the "plist" file since that could not be found in this OS installation. If anything has changed through these efforts, it has been to cause the failure to be more severe. Before attempting any fixes, the downloads usually produced a zero-byte file of the expected name and an apparently full-length download file with the expected name and a ".part" extension (or an abbreviated download file with a jumbled alphanumeric name and ".part" extension). After all the fixes were attempted, with the additional trial of patching the profile from TimeMachine back-ups well before the initiation of the problems, and then a final effort of a complete Firefox re-install (freshly downloaded via the separate account on the computer then Firefox removed prior to a fresh install), downloads now fail for that one problem account producing only the zero-byte file of the expected name and no ".part" files yet seen again. Created new profiles in Firefox under the same computer account inherit the same download problems (tried twice).
FYI: in addition to the troubleshooting information below, the computer account with the Firefox problems reports another four plug-ins (Blue Jeans, RBlue Jeans and "install" for both). As these do not show up on this computer account where the Firefox browser has no download issues, this may matter. But since the download issues were independent of Safe Mode operation for Firefox, presumably the plug-in differences would not matter.