I was having a similar problem with Firefox on Linux Mint 13 "Maya" MATE. For some reason, SoundConverter was associated with this MIME type, so that when I tried to "Open Containing Folder" in Firefox, it would invoke SoundConverter for any download.
By changing the entries in ~/.local/share/applications/mimeapps.list from : inode/directory=soundconverter.desktop; to : inode/directory=caja.desktop; functionality was restored. Thanks! -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/133133 Title: "Open containing folder" is only working if nautilus is present Status in The Mozilla Firefox Browser: Confirmed Status in “firefox” package in Ubuntu: Triaged Bug description: Binary package hint: firefox Tools->Downloads-> (Right click)->Open containing folder Result: Nothing happens (not even an error). Expected: An error, a dialog asking to choose a file manager or just konqueror showing the folder. Fix: add the following line to prefs.js user_pref("network.protocol-handler.app.file", "konqueror"); ProblemType: Bug Architecture: i386 Date: Fri Aug 17 12:54:22 2007 DistroRelease: Ubuntu 7.04 Package: firefox 2.0.0.5+1-0ubuntu1 PackageArchitecture: i386 SourcePackage: firefox Uname: Linux localhost 2.6.20-12-generic #2 SMP Wed Mar 21 20:55:46 UTC 2007 i686 GNU/Linux To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/133133/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp