Up & Coming Extensions

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CompactHeader Featured

Add symbol in header plane to switch between compact and expanded view. Options to switch between one or two lines compact view, which buttons should be displayed in header pane. Linkify RSS subject. Optionally darkens header if message has focus.

Rated 5 out of 5 stars (146)
194,068 users

South African English spell checker

The South African English spell checker allows you to use place names, borrowed words, and other expressions that are unique to South Africa.

"No more eina, just a lekker spell checker!"

Rated 5 out of 5 stars (3)
3,500 users

ReminderFox

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.

Rated 4 out of 5 stars (421)
154,425 users

BlunderDelay

Thunderbird Extension: AutoSend Unsent Messages. Flushes entire outbox at regular intervals.

Rated 4 out of 5 stars (12)
1,332 users

ShowIP

Show the IP address(es) of the current page in the status bar. It also allows querying custom information services by IP (right click) and hostname (left click), like whois, netcraft, etc. Additionally you can copy the IP address to the clipboard.

Rated 3 out of 5 stars (207)
94,620 users

Developer Assistant

A suite of tools for developers.

Rated 4 out of 5 stars (45)
4,267 users

Folderpane Tools

Allows for customization of the folder pane. Accounts can be rearranged and the startup folder can be chosen.

Rated 4 out of 5 stars (102)
52,934 users

DictionarySearch (Official Version)

Looks up a user selected word in an online...

Rated 4 out of 5 stars (104)
14,852 users

SMTP Control

SMTP Control is a Thunderbird Add-ons offering dynamic selection of outbond SMTP server while sending a message.

By default thunderbird offer the ability to define a list of SMTP servers. With one global default server for all email accounts or one ...

Rated 3 out of 5 stars (23)
1,310 users

Forward

Add Inline / As Attachment option to Forward button and Message context menu.

Rated 4 out of 5 stars (23)
5,644 users

Personas Rotator

Personas Rotator is a new companion for Personas Firefox add-on to change over 65000+ skins periodically on Firefox. What Will Your Browser Wear Now?

Rated 4 out of 5 stars (78)
20,533 users

Fingerfox (SE)

Use MS Fingerprint Reader with Firefox and Thunderbird...

Rated 4 out of 5 stars (12)
1,775 users

LocalFolder

Add as many local folders as you want to (like outlook PST).
NB. It doesn't import PST files.

Rated 4 out of 5 stars (7)
7,681 users

Close tab on ESC

Closes a Mozilla Thunderbird tab when pressing the Escape key.

Rated 5 out of 5 stars (31)
2,601 users

Timeline

A Timeline calendar view

Rated 4 out of 5 stars (30)
1,420 users

ThunderSync

Allows to synchronise Thunderbird's addressbook with external directories/files. Every contact is exported/compared with an external file. Right now, only vCard version 2.1 is supported as export file format.

Rated 4 out of 5 stars (8)
9,200 users

Provider for Google Calendar

Allows bidirectional access to Google Calendar

Rated 4 out of 5 stars (504)
309,712 users

Mail Merge Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (110)
42,606 users

Evernote Tab

Add a button and a menu to open Evernote in tab.

Rated 4 out of 5 stars (4)
5,057 users

AddressBook In Mode ToolBar

Add adressbook button to "mode toolbar" (requires lightning extention)

Rated 4 out of 5 stars (7)
1,593 users