I have the same problem here, and I've noticed that even after I kill firefox I have a bunch of plugin-container processes left around:
# Firefox main process not running: $ ps ax|grep firefox|grep -v plugin 6013 pts/11 S+ 0:00 grep --color=auto firefox # but... $ ps ax|grep firefox 3931 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 4001 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 4049 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 4248 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 4296 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5225 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5247 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5270 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5289 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5433 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5480 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5586 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5751 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5852 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5879 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5906 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 2770 true plugin 5976 ? Sl 0:00 /usr/lib/firefox-7.0/plugin-container /var/lib/flashplugin-installer/npwrapper.libflashplayer.so -greomni /usr/lib/firefox-7.0/omni.jar 5928 true plugin 6021 pts/11 S+ 0:00 grep --color=auto firefox this is with firefox 7 on up-to-date Oneiric: $ dpkg-query -W firefox firefox 7.0~b1+build1+nobinonly-0ubuntu1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/830802 Title: firefox freezes and grays out To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/830802/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs