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Open Google Calendar

Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)

Rated 4 out of 5 stars (79)
23,892 users

Ogden's Basic English Dictionary for Media Requires Restart

A spell checker for Ogden's Basic English.

Rated 5 out of 5 stars (1)
1 user

Tok Pisin spell checker Requires Restart

This is a spell checker for Tok Pisin based on a word list created by Helge Søgaard.

Not yet rated
1 user

淘宝领券助手

在用户打开淘宝和天猫商品详情页时,自动查询是否存在优惠券,存在才会显示领券购买,轻量级提示,和页面融为一体。

1.点击“领券”即可跳转到领取优惠券页面,先领取后购买,更省钱
2.点击插件图标可以,输入宝贝标题可以快速搜索有优惠券的宝贝

Not yet rated
1 user

Textmarker

Highlights selected text when composing emails. Default colour is yellow - other colours are available via Options.
(Works only during writing an e-mail, i.e. only in the compose window.)

Rated 5 out of 5 stars (33)
43,040 users

keepassxc-mail

MailExtension to get password from KeePassXC.

Rated 4 out of 5 stars (7)
1,342 users

Grammar and Spell Checker — LanguageTool

Check your emails for spelling and grammar issues

Rated 4 out of 5 stars (36)
73,947 users

TaskviewGridLayout

TaksviewGridLayout works in Thunderbird version 78.0~102.*.
If clicking any task after (re)starting Thunderbird, it PERSISTs.

REQUIREMENTS:
1. 1920 x 1080 RESOLUTION
2. 100% MAGNIFICATION

Praise Stephen Kim Sou-hwan.

April 2nd 2023.

Rated 1 out of 5 stars (1)
4 users

AddAccents

This extension allows you to easily insert accented characters as you type in firefox or thunderbird. It is similar to abctajpu (no longer supported). With the default settings, simply press "e" followed by "\" to insert "é" "a\" to insert "à" etc...

Rated 5 out of 5 stars (3)
184 users

Reply with subaddress

Reply to a message that was sent to a subaddess with the same address.

Example: Your primary email is tim@mymail.tld, you receive a mail to the subaddress tim+mailinglists@mymail.tld, the sender of replies is set to tim+mailinglists@mymail.tld.

Rated 3 out of 5 stars (3)
66 users

Google Chat Tab

Open Google Chat in a Thunderbird Tab.

Update: 3 Dec 2024 -
Literally all this extension does is to open Google Chat in a separate tab. Thank you for all your kind comments! I made this to scratch an itch and I'm glad it has helped so many :)

Rated 4 out of 5 stars (11)
1,755 users

RT Archive Emails to Sugar & SuiteCRM

Archive Emails from Thunderbird to a Sugar or SuiteCRM record of your choice with RT Archive Email.
You can archive one or more emails, along with their attachments, to a Contact, Lead, Account, Opportunity, or Project.

Rated 4 out of 5 stars (5)
87 users

telegramwebapp

Adds browser action icon to toolbar to open Telegram. See https://thunderbird-essentials.thomas-bandl.de/wordpress/2020/10/04/telegram-button/

Rated 3 out of 5 stars (2)
103 users

Date detection

Turn the dates and time references in your email (e.g. "tomorrow", "in 2 hour") into clickable links. Clicking them will create an event at the corresponding date.

Rated 2 out of 5 stars (3)
91 users

Archive 3 Month

Archive messages that are older than 3 months in inbox and sent folder

Not yet rated
36 users

Outlook/Teams Appointments

Get the hidden appointment from an email from outlook/teams as a .ics-file - Icon: https://fontawesome.com/

Rated 4 out of 5 stars (13)
5,808 users

wikipediasearchwebapp

Adds browser action icon to toolbar to open Wikipedia-Search. See http://thunderbird-essentials.thomas-bandl.de/wordpress/2020/10/05/wikipedia-suche-button/

Not yet rated
13 users

Check Time

メール送信時、勤務時間内かどうかを確認します。

Not yet rated
2 users

FrameWhite

FrameWhite version 141.1 was released, Thunderbird never drop down the letter.
Install Theme 1 or more, And then, manage FrameWhite, so that action is allowed.

send this gift to a friend Eunjo.

Rated 4 out of 5 stars (6)
535 users

*cloud - FileLink for Nextcloud and ownCloud Featured

Upload large attachments to your Cloud and send the link by email

Rated 5 out of 5 stars (51)
38,645 users