Add-ons
Recently Updated Extensions
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Bugmail (fixed version)
Requires Restart
A bugzilla companion (fixed version). Originally maintained by Fabrice Desré.
Cookies Exterminator
Auto delete cookies, localStorage and IndexedDB objects as soon as they become unused
WebRTC Permissions UI Toggle
Requires Restart
A toolbar button for SeaMonkey to bypass the missing WebRTC permissions dialog and temporarily allow media capture.
Enigmail
Featured
OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.
µBlock
The most efficient blocker for Firefox.
No ads, no tracking, and insanely faster page loads.
Sort and Search Customization Dialogs
Requires Restart
Sort and search for buttons in (any) toolbar customization dialog
Classic Password Editor
Requires Restart
Adds the ability to create and edit entries in the password manager.
Send Later Button
Requires Restart
A simple button to invoke the (already existing) send later functions.
Send Later
Requires Restart
True "Send Later" functionality to schedule the time for sending an email.
Dictionary for recipient
Sets the spell check dictionary based on the first recipient
ConfigDate
Requires Restart
ConfigDate allows to configure the "Date" column in message threadpane. When displaying the message header, it is possible to display the (default) formated date or the senders local sent time (Date-String).
QuoteCollapse
Requires Restart
Collapse and expand quotes. Please see the extension homepage for further information.
Note that MozDev has shut down long ago (mailing list etc). Add-On homepage, source code and issue tracker are on GitHub, as linked on this page.
PlayFlash 64bit
Requires Restart
Flash player plugin - unofficial xpi repack for 64bit browsers. Use when official plugin installer is not suitable. All binary files are copyrighted by their authors and distributed for free.
PlayFlash 32bit
Requires Restart
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.
QuickFolders (Tabbed Folders)
Requires Restart
The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.
See new mail at a glance after automatic filtering - supports quickFilters addon!
Tiny JavaScript Debugger
TinyJSD is a JavaScript debugger for privileged code running Mozilla products like Firefox, Thunderbird, SeaMonkey. It serves to debug the application as well as extensions written in JavaScript.
ReminderFox
Requires Restart
Featured
ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.
Dorando keyconfig
Requires Restart
A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)
As of version 2016.2, Custom keys (using custom JavaScript) work again!
Mozilla Archive Format, with MHT and Faithful Save
Requires Restart
— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!
AVIM
Requires Restart
Vietnamese-language input method editor (IME). Type diacritics directly into any Web page, Web app, or dialog box. Convenient, comprehensive, secure.
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Bộ gõ tiếng Việt cho phép đặt dấu trực tiếp vào bất kỳ trang Web, ứng dụng Web, hộp thoại.
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