Как я могу исправить проблемы с зависимостями в firefox? [дубликат]

Возможный дубликат:
Как разрешить неудовлетворенные зависимости ?

Я ничего не могу сделать из Центра программного обеспечения Ubuntu или из Терминала

Вот что я получаю из командной строки:

deus@comp:~$ sudo apt-get autoremove
[sudo] password for deus: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
firefox-globalmenu : Depends: firefox (= 18.0+build1-0ubuntu0.12.04.3) but it is not installed
E: Unmet dependencies. Try using -f.
deus@comp:~$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
firefox
Suggested packages:
latex-xft-fonts firefox-gnome-support
The following NEW packages will be installed:
firefox
0 upgraded, 1 newly installed, 0 to remove and 5 not upgraded.
1 not fully installed or removed.
Need to get 0 B/23.7 MB of archives.
After this operation, 49.7 MB of additional disk space will be used.
Do you want to continue [Y/n]? Y
(Reading database ... 203826 files and directories currently installed.)
Unpacking firefox (from .../firefox_18.0+build1-0ubuntu0.12.04.3_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/firefox_18.0+build1-0ubuntu0.12.04.3_i386.deb (--unpack):
trying to overwrite '/usr/lib/firefox/plugins', which is also in package adobe-flashplugin 11.2.202.261-0precise1
Processing triggers for bamfdaemon ...
Rebuilding /usr/share/applications/bamf.index...
Processing triggers for desktop-file-utils ...
Processing triggers for gnome-menus ...
Processing triggers for man-db ...
Errors were encountered while processing:
/var/cache/apt/archives/firefox_18.0+build1-0ubuntu0.12.04.3_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
deus@comp:~$ sudo apt-get clean
deus@comp:~$ sudo apt-get check
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
firefox-globalmenu : Depends: firefox (= 18.0+build1-0ubuntu0.12.04.3) but it is not installed
E: Unmet dependencies. Try using -f.
deus@comp:~$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
firefox
Suggested packages:
latex-xft-fonts firefox-gnome-support
The following NEW packages will be installed:
firefox
0 upgraded, 1 newly installed, 0 to remove and 5 not upgraded.
1 not fully installed or removed.
Need to get 23.7 MB of archives.
After this operation, 49.7 MB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://gr.archive.ubuntu.com/ubuntu/ precise-updates/main firefox i386 18.0+build1-0ubuntu0.12.04.3 [23.7 MB]
Fetched 23.7 MB in 1min 27s (271 kB/s)                                         
(Reading database ... 203826 files and directories currently installed.)
Unpacking firefox (from .../firefox_18.0+build1-0ubuntu0.12.04.3_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/firefox_18.0+build1-0ubuntu0.12.04.3_i386.deb (--unpack):
trying to overwrite '/usr/lib/firefox/plugins', which is also in package adobe-flashplugin 11.2.202.261-0precise1
Processing triggers for bamfdaemon ...
Rebuilding /usr/share/applications/bamf.index...
Processing triggers for desktop-file-utils ...
Processing triggers for gnome-menus ...
Processing triggers for man-db ...
Errors were encountered while processing:
/var/cache/apt/archives/firefox_18.0+build1-0ubuntu0.12.04.3_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

Есть идеи, что происходит не так?

РЕДАКТИРОВАТЬ / ОТВЕТИТЬ НА КОММЕНТАРИИ

@Lucio Я сделал то, что вы сказали, и вот результат.

deus@comp:~$ sudo dpkg -r firefox
dpkg: warning: there's no installed package matching firefox
deus@comp:~$ ^C
deus@comp:~$ apt-get -f install && sudo apt-get update && sudo apt-get upgrade
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?
deus@comp:~$ sudo apt-get -f install && sudo apt-get update && sudo apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
firefox
Suggested packages:
latex-xft-fonts firefox-gnome-support
The following NEW packages will be installed:
firefox
0 upgraded, 1 newly installed, 0 to remove and 8 not upgraded.
1 not fully installed or removed.
Need to get 0 B/23.7 MB of archives.
After this operation, 49.7 MB of additional disk space will be used.
Do you want to continue [Y/n]? Y
(Reading database ... 203826 files and directories currently installed.)
Unpacking firefox (from .../firefox_18.0+build1-0ubuntu0.12.04.3_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/firefox_18.0+build1-0ubuntu0.12.04.3_i386.deb (--unpack):
trying to overwrite '/usr/lib/firefox/plugins', which is also in package adobe-flashplugin 11.2.202.261-0precise1
No apport report written because MaxReports is reached already
                                                            Processing triggers for bamfdaemon ...
Rebuilding /usr/share/applications/bamf.index...
Processing triggers for desktop-file-utils ...
Processing triggers for gnome-menus ...
Processing triggers for man-db ...
Errors were encountered while processing:
/var/cache/apt/archives/firefox_18.0+build1-0ubuntu0.12.04.3_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)