I ran a stacktrace and can see some odd messages in it right around when the unresponsiveness occurs and also I noticed in the stacktrace it seems to be looking for some libraries that are not found?
** Attachment added: "Firefox Stacktrace" https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1165252/+attachment/3681336/+files/firefox-strace -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1165252 Title: Firefox becomes unresponsive when savings images To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1165252/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs