I also had the same Firefox behavior right now (see attached bug report "Firefox crashing when dragging a text to the editable field").
Many times I saw that dragging anything in Firefox or Thunderbird can cause a real slowdown - the system simply lost responsiveness for dome time. Crashing is only worse version of the same problem. ** Attachment added: "Firefox crashing when dragging a text to the editable field" http://librarian.launchpad.net/6478160/_usr_lib_firefox_firefox-bin.1000.crash -- Firefox Coredump dragging content https://launchpad.net/bugs/71182 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs