Introduction to SeaMonkey

SeaMonkey is a browser suite, the Open Source sibling of Netscape. It includes the browser, composer, mail and news clients, and an IRC client. It is the follow-on to the Mozilla browser suite.

The Mozilla project also hosts two subprojects that aim to satisfy the needs of users who don't need the complete browser suite or prefer to have separate applications for browsing and e-mail. These subprojects are Firefox-68.5.0 and Thunderbird-68.5.0. Both are based on the Mozilla source code.

This package is known to build and work properly using an LFS-9.1 platform.

Package Information



The tarball seamonkey-2.53.1.source.tar.xz will untar to seamonkey-2.53.1 directory.

SeaMonkey Dependencies


Autoconf-2.13, both GTK+-2.24.32 and GTK+-3.24.13, rustc-1.37.0, UnZip-6.0, yasm-1.3.0, and Zip-3.0




If you don't install recommended dependencies, then internal copies of those packages will be used. They might be tested to work, but they can be out of date or contain security holes.


alsa-lib-, cURL-7.68.0, dbus-glib-0.110, Doxygen-1.8.17, GConf-3.2.6, gst-plugins-base-1.16.2 (and other plugins, only for tests), OpenJDK-12.0.2, startup-notification-0.12, Valgrind-3.15.0, Wget-1.20.3, Wireless Tools-29, and Hunspell

User Notes:

Installation of SeaMonkey

The configuration of SeaMonkey is accomplished by creating a mozconfig file containing the desired configuration options. A default mozconfig file is created below. To see the entire list of available configuration options (and an abbreviated description of each one), issue ./configure --help. You may also wish to review the entire file and uncomment any other desired options. Create the file by issuing the following command:

cat > mozconfig << "EOF"
# If you have a multicore machine, all cores will be used by default.
# If desired, you can reduce the number of cores used, e.g. to 1, by
# uncommenting the next line and setting a valid number of CPU cores.
#mk_add_options MOZ_MAKE_FLAGS="-j1"

# If you have installed DBus-Glib comment out this line:
ac_add_options --disable-dbus

# If you have installed dbus-glib, and you have installed (or will install)
# wireless-tools, and you wish to use geolocation web services, comment out
# this line
ac_add_options --disable-necko-wifi

# Uncomment these lines if you have installed optional dependencies:
#ac_add_options --enable-system-hunspell
#ac_add_options --enable-startup-notification

# Uncomment the following option if you have not installed PulseAudio
#ac_add_options --disable-pulseaudio
# and uncomment this if you installed alsa-lib instead of PulseAudio
#ac_add_options --enable-alsa

# Comment out following option if you have gconf installed
ac_add_options --disable-gconf

# Comment out following options if you have not installed
# recommended dependencies:
ac_add_options --enable-system-sqlite
ac_add_options --with-system-libevent
ac_add_options --with-system-nspr
ac_add_options --with-system-nss
ac_add_options --with-system-icu

# The BLFS editors recommend not changing anything below this line:
ac_add_options --prefix=/usr
ac_add_options --enable-application=suite

ac_add_options --disable-crashreporter
ac_add_options --disable-updater
ac_add_options --disable-tests

ac_add_options --enable-optimize="-O2"
ac_add_options --enable-strip
ac_add_options --enable-install-strip

# not recognized since 2.53.1 - ac_add_options --enable-gio
ac_add_options --enable-official-branding
# not recognized since 2.53.1 - ac_add_options --enable-safe-browsing
# not recognized since 2.53.1 - ac_add_options --enable-url-classifier

# From firefox-40 (and the corresponding version of seamonkey),
# using system cairo caused seamonkey to crash
# frequently when it was doing background rendering in a tab.
# This appears to again work in seamonkey-2.49.2
ac_add_options --enable-system-cairo
ac_add_options --enable-system-ffi
ac_add_options --enable-system-pixman

ac_add_options --with-pthreads

ac_add_options --with-system-bz2
ac_add_options --with-system-jpeg
ac_add_options --with-system-png
ac_add_options --with-system-zlib


If you are compiling SeaMonkey in chroot, make sure you have the SHELL environment variable set or prepend SHELL=/bin/sh to the first make command below.

Remove a function definition, which is incompatible with the one in glibc-2.30:

sed -i -e '/pid_t gettid/,+3 s@^@//@' mozilla/tools/profiler/core/platform.h

Compile SeaMonkey by running the following commands:

CC=gcc CXX=g++ make -f


The CC and CXX variables above are only needed if LLVM-9.0.1 is installed and you do not want to use clang.

This package does not come with a test suite.

Install SeaMonkey by issuing the following commands as the root user:

make  -f install INSTALL_SDK= &&
chown -R 0:0 /usr/lib/seamonkey-2.53.1    &&

cp -v $(find -name seamonkey.1 | head -n1) /usr/share/man/man1

Command Explanations

make -f Mozilla products are packaged to allow the use of a configuration file which can be used to pass the configuration settings to the configure command. make uses the file to get initial configuration and setup parameters.

Configuring SeaMonkey

For installing various SeaMonkey plugins, refer to Mozdev's PluginDoc Project.

Along with using the Preferences menu to configure SeaMonkey's options and preferences to suit individual tastes, finer grain control of many options is only available using a tool not available from the general menu system. To access this tool, you'll need to open a browser window and enter about:config in the address bar. This will display a list of the configuration preferences and information related to each one. You can use the Filter: bar to enter search criteria and narrow down the listed items. Changing a preference can be done using two methods. One, if the preference has a boolean value (True/False), simply double-click on the preference to toggle the value and two, for other preferences simply right-click on the desired line, choose Modify from the menu and change the value. Creating new preference items is accomplished in the same way, except choose New from the menu and provide the desired data into the fields when prompted.



There is a multitude of configuration parameters you can tweak to customize SeaMonkey. A very extensive list of these parameters can be found at

If you use a desktop environment like Gnome or KDE you may wish to create a seamonkey.desktop file so that SeaMonkey appears in the panel's menus. If you didn't enable Startup-Notification in your mozconfig change the StartupNotify line to false. As the root user:

mkdir -pv /usr/share/{applications,pixmaps}              &&

cat > /usr/share/applications/seamonkey.desktop << "EOF"
[Desktop Entry]
Comment=The Mozilla Suite

ln -sfv /usr/lib/seamonkey-2.53.1/chrome/icons/default/seamonkey.png \


Installed Programs: seamonkey
Installed Libraries: Numerous libraries, browser, and email/newsgroup components, plugins, extensions, and helper modules installed in /usr/lib/seamonkey-2.53.1
Installed Directory: /usr/lib/seamonkey-2.53.1

Short Descriptions


is the Mozilla browser/email/newsgroup/chat client suite.

Last updated on 2020-02-29 08:01:53 -0800