I have had this problem several times previously. Here is a debug report (debugging symbols included).
** Attachment added: "Crash report." http://librarian.launchpad.net/6145344/_usr_lib_firefox_firefox-bin.1000.crash -- firefox crash when clicking and dragging a link https://launchpad.net/bugs/72454 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs