@Steve

it tries to remove half of the system, this is the output

┌─[andrea@ushuaia:~]
└─> sudo apt-get install libnspr4:i386 libnss3:i386
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  account-plugin-icons account-plugin-windows-live erlang-asn1 erlang-base erlang-crypto erlang-eunit erlang-inets erlang-mnesia erlang-os-mon erlang-public-key erlang-runtime-tools erlang-snmp
  erlang-ssl erlang-syntax-tools erlang-tools erlang-webtool erlang-xmerl libcouchdb-glib-1.0-2 libdesktopcouch-glib-1.0-2 libebackend-1.2-2 libecal-1.2-11 libedata-cal-1.2-15 libjs-jquery-form libsctp1
  libssl0.9.8 libtelepathy-farstream2 lksctp-tools python-avahi python-couchdb python-desktopcouch-application python-desktopcouch-records signon-plugin-password
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
  account-plugin-aim account-plugin-jabber account-plugin-salut account-plugin-yahoo ca-certificates-java chromium-browser chromium-browser-l10n chromium-codecs-ffmpeg couchdb-bin desktopcouch
  desktopcouch-ubuntuone ecryptfs-utils empathy epiphany-browser evolution evolution-couchdb-backend evolution-data-server evolution-indicator evolution-plugins evolution-plugins-experimental
  flashplugin-installer geoclue geoclue-ubuntu-geoip gir1.2-gdata-0.0 gir1.2-ubuntuoneui-3.0 gnome-contacts gnome-control-center gnome-control-center-signon gnome-power-manager gnome-session
  gnome-settings-daemon google-chrome-stable icedtea-6-jre-cacao icedtea-6-jre-jamvm icedtea-7-jre-jamvm indicator-datetime indicator-power indicator-session libcamel-1.2-29 libcamel-1.2-33
  libcamel-1.2-40 libcurl3-nss libebackend-1.2-5 libebook-1.2-13 libebook-1.2-14 libecal-1.2-15 libecryptfs0 libedata-book-1.2-13 libedata-book-1.2-15 libedata-cal-1.2-18 libedataserver-1.2-17
  libedataserverui-3.0-1 libedataserverui-3.0-4 libevolution libfolks-eds25 libgdata13 libmozjs185-1.0 libnm-glib-vpn1 libnm-glib4 libnm-gtk0 libnm-util2 libnspr4 libnspr4-0d libnss3 libnss3-1d liboauth0
  libpurple0 libreoffice-base-core libreoffice-calc libreoffice-core libreoffice-draw libreoffice-emailmerge libreoffice-gnome libreoffice-gtk libreoffice-help-en-us libreoffice-impress libreoffice-math
  libreoffice-ogltrans libreoffice-pdfimport libreoffice-presentation-minimizer libreoffice-presenter-console libreoffice-writer libubuntuoneui-3.0-1 lo-menubar mcp-account-manager-uoa mythes-en-us
  nautilus-sendto nautilus-sendto-empathy network-manager network-manager-gnome network-manager-openvpn network-manager-openvpn-gnome network-manager-pptp network-manager-pptp-gnome openjdk-6-jre
  openjdk-6-jre-headless openjdk-6-jre-lib openjdk-7-jre openjdk-7-jre-headless openjdk-7-jre-lib pidgin pidgin-libnotify pidgin-microblog python-uno rhythmbox-ubuntuone spotify-client telepathy-haze
  telepathy-mission-control-5 thunderbird-couchdb thunderbird-gnome-support ubuntu-desktop ubuntuone-client-gnome unity-chromium-extension unity-greeter unity-lens-photos unity-scope-gdocs
  unity-scope-musicstores webaccounts-chromium-extension
The following NEW packages will be installed:
  libnspr4:i386 libnss3:i386
0 upgraded, 2 newly installed, 118 to remove and 1 not upgraded.
Need to get 142 kB/1,255 kB of archives.
After this operation, 764 MB disk space will be freed.
Do you want to continue [Y/n]?