Public bug reported: See https://bugzilla.mozilla.org/show_bug.cgi?id=727422
With Firefox, default applications are selected by Firefox using /usr/share/applications/mimeinfo.cache, however, this list is a system generated list in random order and therefor does not reflect the user's preferences of which application should be used to open a file. When I click on a pdf (for example), I want to have the option to open it in my default application, in my case in okular, and not in something else. However, acroread is invariably presented is presented as default choice because it happens to be the first entry in /usr/share/applications/mimeinfo.cache for application/pdf. This happens in spite of the fact that the desktop provides correct defaults.list and mimeapps.list files The comments in the firefox bug seem to suggest that firefox developers are convinced that firefox calls the correct gtk libraries to determine the correct application. If this is the case, then it is necessarily the ubuntu (or possibly kubuntu) infrastructure to be failing. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: firefox 44.0.2+build1-0ubuntu0.15.10.1 ProcVersionSignature: Ubuntu 4.2.0-30.36-generic 4.2.8-ckt3 Uname: Linux 4.2.0-30-generic x86_64 ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 BuildID: 20160209234513 CurrentDesktop: KDE Date: Mon Feb 29 11:37:25 2016 EcryptfsInUse: Yes InstallationDate: Installed on 2013-12-12 (808 days ago) InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) SourcePackage: firefox UpgradeStatus: Upgraded to wily on 2015-10-23 (129 days ago) ** Affects: firefox (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug third-party-packages wily -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1551171 Title: /usr/share/applications/mimeinfo.cache is used for default applications in Firefox To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1551171/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs