Add-ons

Saved Password Editor by Daniel Dawson

Adds the ability to create and edit entries in the password manager.

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.

RequestPolicy Continued by Martin Kimmerle

Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.

ThunderBirthDay by ingomueller.net

Display birthdays from the Thunderbird addressbooks as events in Lightning.

ConfirmFolderMove by Ryan Lee

Introduces a preference that allows users to be prompted before moving folders.

Filter Button Thunderbird by M@htte0

Adds a button to run...

From Mars by MaDonna

Cave view by Cybertor

Shamrocks & Lady Bug by Leigh Anne

aquatic plants by candelora

Red Matrix by B100D ST41N3D by bspizza

Chikusei by digitalblasphemy

Dew on Grass by MaDonna

Maroon by KFirejumper

Red Dawn by Thomas