Java, Plug-ins and Other Extras

This document describes installation and configuration of Java, plug-ins and other SeaMonkey extras. Additional user help documentation can be found at the End User documentation pages.

For more information on plug-ins, see the plugin doc at


Windows and Linux: To run Java applets, you must install the Java Run Time Environment (JRE) plug-in.

Windows: If you're using the Installer build and you already have a compatible JRE on your system SeaMonkey should recognize it. If you've manually set the preference to disable automatic plugin searches then you can do the following to get Java working: After the JRE is installed on your machine, copy NPOJI610.dll from the install directory (something like C:\Program Files\JavaSoft\JRE\<version>\bin) to your SeaMonkey plugins directory (something like C:\Program Files\\SeaMonkey\plugins).

Linux Put a symlink to /usr/java/jre<version>/plugin/i386/ns610-gcc32/ in your plugins/ directory. In case of Java 1.5/5.0 or higher, use /usr/java/jre<version>/plugin/i386/ns7/ rather than /usr/java/jre<version>/plugin/i386/ns7-gcc29/ (Note copying the file instead of making the symlink will cause Java to crash.)

With Linux RPM builds, you must install Java as the root user.

Mac OS X To take advantage of the newest Java VM available (1.5.0 as of this writing) and to avoid some bugs of the outdated Java 1.3.1 plugin, you have to install Java Embedding Plugin for Mac OS X (Bug 274312)

Installing Address Book Palm Sync on Windows

To be able to sync between SeaMonkey's address book and your Palm, choose Address Book Palm Sync Install in the SeaMonkey group in the Start Programs menu. Note that if you set up your Palm to sync its address book with SeaMonkey, the address book will no longer sync with the Palm Desktop.

Once you have done this you can connect your Palm device and hit the HotSync button on your Palm cradle. This should bring up the HotSync Manager dialog on your desktop and should start SeaMonkey. Once sync is complete, close SeaMonkey and then restart it and open SeaMonkey Address Book to verify the sync.

Some Palm users may need to add an extra step to this process and add a registry key by hand.

  1. Download this registry key and save to your hard drive. Note: this link no longer seems to work.
  2. If your Palm software is not installed in C:\Palm then edit the registry key file and set the proper path. Please make sure that the path you specify is within " " and for each directory separator use two ( use \\ for each \ ).
  3. Now go to Windows explorer and double click on this file. This should display a message saying "Information in this file has been successfully entered into the registry".
  4. Redo the Address Book Palm Sync Install to enable SeaMonkey Address Book Palm Sync.


Many Linux systems (in particular, Red Hat Linux systems) have bad Arial fonts. (Bug 46415) If many Web pages, especially those using the Arial font, look unclear, small, or hard to read, the following links explain two ways you can change your font server to get better Arial fonts:

If that doesn't work, you may be able to fix the problem by renaming or removing /usr/share/fonts/ISO8859-2. For instance, enter the following command:
mv /usr/share/fonts/ISO8859-2 /usr/share/fonts.ISO8859-2

and then log out of Linux and log back in again. You can always undo this, if necessary, by entering the following command:
mv /usr/share/fonts.ISO8859-2 /usr/share/fonts/ISO8859-2


A variety of extensions to SeaMonkey are available from the including additional search engine plugins, support for telnet:// URLs on Linux (and other UNIX systems), tabbed browser enhancements, and other add-ons for SeaMonkey. These extensions are not officially supported by, but may be of interest to users seeking to expand the capabilities of their SeaMonkey installation. A large number of addons are also available at Mozilla Update.

Quality Feedback Agent

Note: the Quality Feedback Agent does not currently work with SeaMonkey

Quality Feedback Agent collects data about SeaMonkey in the event of a crash. Such information helps SeaMonkey developers to quickly isolate the cause of a crash and then correct it. The software does not collect any sensitive information such as Web sites visited and passwords. Reporting crash data is one of many ways in which users can help improve the quality of the software. Participation is not required but highly recommended.

On Windows, if you are using automatic proxy configuration, you need to edit your talkback.ini file for Quality Feedback Agent to work.