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googlesearchwebapp
Adds browser action icon to toolbar to open Google-Web-Search. See http://thunderbird-essentials.thomas-bandl.de/wordpress/2020/10/05/google-websuche-button/
todowebapp
Adds browser action icon to toolbar to open To-Do. See https://thunderbird-essentials.thomas-bandl.de/wordpress/2020/10/04/microsoft-to-do-button/
selectAll Button
This Add-on installs a button on the mail toolbar that will when clicked select all messages within the folder.
Send Later Button
The Send Later Button extension enhances Thunderbird by enabling 'Send Later' even in online mode. It supports many Languages, ensuring a seamless user experience.
See: https://github.com/That-Developer-Guy/Send-Later-Button-Thunderbird/
regimail
AddOn for sending regimail with Thunderbird on Windows, MacOS and Linux.
*IMPORTANT:*
In order to use this AddOn, you need to install the regify client on your system and configure it with a valid regify account.
WhatsApp Web in Thunderbird
Clacks Overhead
In tribute to the late Sir Terry Pratchett, many users are adding the message "GNU Terry Pratchett" into the email header "X-Clacks-Overhead". Clacks Overhead shows users when this appears in their emails and displays the message included.
StandardTexter
With the help of this Add-on, up to 99 pre-made texts (standard texts, text modules or even signatures) can be stored, which can then be retrieved and inserted when writing an e-mail.
The texts can be preformatted with HTML.
English (US) Dictionary
This add-on repackages the en-US dictionary available in mozilla-central, which uses the normal (size 60) word list by SCOWL and integrates it with over 6 thousand words.
GTrash
Provides a button and keyboard shortcut (Shift + Alt + Delete by default) to move mail to its account's Trash folder, regardless of normal delete setting. It was developed to improve the experience of using GMail via IMAP.
Extract 'Em!
Featured
Extracts attachments from messages within an account or folder, with the option to select specific attachments. By default, extracted attachments are saved to a .zip file.
Articles Toolbar
Auto Avatars
Add-on for Thunderbird that automatically populates contact photos with their Libravatar or Gravatar photo. Includes support for custom instances and federation!
Google Keep - Quick Access
Quick Access to Google Keep in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.
Identity Selector
Copy Email Folder
This extension allows you to automatically copy email messages from one folder to another with all subfolders and perform a merge of the contents. It is a helpful tool for users who want to back up or sync folders but avoid duplicating emails.
ThunderAI Sparks
ThunderAI Sparks is an add-on designed to add advanced features to ThunderAI.
Maldives Dhivehi SpellcheckerTo create your own collections, you must have a Mozilla Add-ons account.
