Add-ons

QuickNote by Leszek Życzkowski, Jed Brown, others

A simple note-taking extension.

ReminderFox by Tom Mutdosch, Daniel Lee, others

ReminderFox displays and manages lists of reminders and tasks. ReminderFox uses easy-to-use lists with warnings/alarms to remind you of all your important appointments.
Synchronize ReminderFox with other calendars as well.

Restart by Schuzak

"Restart" menu and button, with configurable shortcut key.

Collector's Note Used SeaMonkey Converter to convert this from Fx-for-Android to SM.

Cookies Exterminator by Off JustOff

Auto delete cookies, localStorage and IndexedDB objects as soon as they become unused

Addons Recent Updates by Infocatcher

Show more addons recent updates

Classic Firǝfox theme for SeaMonkey by artam

Classic legacy Firǝfox based theme for SeaMonkey 2.x

AMO Browsing for SeaMonkey by iBreniaR, Lemon Juice, others

This extension makes browsing for extensions easier at addons.mozilla.org. It fixes incorrect information about some extensions being not available for SeaMonkey and adds links to the Add-on Converter where needed.

InfoLister by Nickolay Ponomarev

Lists installed add-ons (extensions, themes, plugins). Mozilla does not allow me to publish the version compatible with Firefox 48+, see http://forums.mozillazine.org/viewtopic.php?f=48&t=2084957&p=14715558#p14715558 for details.