Add-ons
Most Popular See all »
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A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.17,091 users -
Adds some tools to import and export folders and messages11,546 users -
Australian English Dictionary for Mozilla applications.10,117 users -
This extension is based on László Németh's Hungarian Dictionary9,331 users -
Allow to redirect (a.k.a. "remail") mail messages to other recipients.3,695 users
Top Rated See all »
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Use SeaMonkey as a standalone e-mail client. Set up a default browser for links opened from Mail & Newsgroups.337 users -
Flash player plugin - unofficial xpi repack for 32bit browsers.
Use when official plugin installer is not suitable.
All binary files are copyrighted by their authors and distributed for free.79 users -
Join partial messages. Somewhat similar to MS Outlook Express "combine and decode".978 users
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Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Version 3.0 also includes sorting buttons. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.1 user
Recently Added See all »
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This extension allows you to manually sort (order) your folders in the folder pane of SeaMonkey Mail or automatically sort them, but in a better way. This extension also allows you to re-order accounts in the folder pane.16 users -
Select sender mail address based on the recipient and reply with the same address16 users
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Lightweight add-on that automatically copies any highlighted text to clipboard.9 users
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With MyAdFilter, free content creators propose you only one ad. Apart from those, as your usual ad-blocker, MyAdFilter disables all ads.4 users -
XDM integration module for Firefox on Linux and Mac1 user
See all 173 extensions in Miscellaneous »
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