The file created by Firefox was not CoreDump.gz but _usr_lib_firefox_firefox-bin.1000.crash, it was in /var/crash.
Hope it helps. ** Attachment added: "Crash file from Firefox" http://librarian.launchpad.net/6795743/_usr_lib_firefox_firefox-bin.1000.crash -- firefox crashes when switching tab https://launchpad.net/bugs/91977 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
