Is also happening to me, similar to David Oxland, am on edgy too, did an upgrade from dapper.
** Attachment added: "crash report" http://librarian.launchpad.net/4938538/_usr_lib_firefox_firefox-bin.Yg3DxN.crash -- Crash after firefox is opening a new window (when it should open the new URL in the same window/tab) https://launchpad.net/bugs/19552 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs