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seamonkey(1) Linux User's Manual seamonkey(1)


seamonkey - an internet application suite (browser, mail, etc.)


seamonkey [OPTIONS] [URL]


SeaMonkey is an all-in-one Internet application suite (previously made popular by Netscape and Mozilla). It includes an Internet browser, advanced e-mail, newsgroup and feed client, a calendar, IRC client, HTML editor and a tool to inspect the DOM for web pages. It is derived from the application formerly known as Mozilla Application Suite.


A summary of the options supported by seamonkey is included below.

X11 options

X display to use
Make X calls synchronous
Make all warnings fatal

SeaMonkey options

Show summary of options.
Print seamonkey version.
Start with profile.
Start with profile at path.
Create a new profile in the default directory, but do not start the application. The profile will be named profile_name in the profile manager, the profile_name must not contain spaces. Do not run profile_name while running an instance of the application, you can use the -no-remote option to avoid connecting to a running instance.
The same, but creates a new profile in the profile_dir directory. Note profile_name and profile_dir are quoted together, and are separated by exactly 1 space.
Start with import wizard (if you have proper import sources).
Start with profile manager.
Do not accept or send remote commands. Implies -new-instance.
Open new instance, not a new window in running instance, which allows multiple copies of application to be open at a time.
Launches the application with all extensions disabled, for that launch only (extensions are not loaded, but are not permanently disabled in the extension manager data source).
Runs SeaMonkey in headless mode, which is very useful for purposes such as debugging and automated testing.
Open the address book at startup.
Compose a mail or news message. Options are specified as string "option='value,...',option=value,..." and include: from, to, cc, bcc, newsgroups, subject, body, message (file), attachment (file), format (html | text). Example:,subject='Dinner tonight?'
Open the Browser Console.
Gecko (layout engine) has a JavaScript cache, which is not reset on startup, this clears it.
Start with editor (composer) for the given url (optional).
Open the Mail&News folder view.
Open the message specified by this url.
Start with the offline mode. This option will only work if SeaMonkey is set to "detect automatically" the online/offline status on startup. To set this, go to Edit -> Preferences -> Mail & Newsgroups -> Network & Storage and in the "Offline" group choose "Detect automatically (if available)" in the "When starting up:" drop-down box.
Open the Error Console.
Open a browser window.
Open a private browsing window.
Open url in a new browser window.
Open url in a new browser tab.
Open the specified url.
Load the specified chrome.
Register the specified chrome, but do not start application.
Search term with your default search engine.
Open Preferences window.
Execute command in an already running SeaMonkey process. For more info, see:
Don't open default windows. Useful with those command-line arguments that open their own windows but don't already prevent default windows from opening.



To report a bug, please visit


firefox(1), thunderbird(1)

August 5, 2020 seamonkey