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Any Confirmation Message before Send
Requires Restart
You can set Any Confirmation Message before Send.
Forward
Requires Restart
Add Inline / As Attachment option to Forward button and Message context menu.
Great DANE
Requires Restart
Retrieve DANE S/MIME Certificates for Encryption/Signing.
This extension enables users to automatically retrieve S/MIME certificates using the Great DANE Engine (https://github.com/grierforensics/Great-DANE-Engine).
ZNotes
Requires Restart
Save everything you like. Simple text notes and pages downloaded from the internet, rich multimedia. Store any files and contacts from your address book with notes.
SavedSearchThemAll
Requires Restart
A Thunderbird extension to automagically extend all the saved searches to all the foders!
TitleCase For Thunderbird
Requires Restart
Transform strings into Title Case, Proper Case, Start Case, Camel Case, Upper Case, and Lower Case. Highlight your text and only changing what you highlighted.
Squared Australis Tabs (Tb)
A small and simple extension, which replaces the curved tabs of the Australis design with squared ones, similar to Thunderbird v14 and prior.
Reply to All as Cc
Requires Restart
Send a reply for recipients as CC except the sender, when you do "Reply to All".
Address bulk copy （アドレス一括コピー）
Requires Restart
Thunderbird は Outlook のようにアドレス全選択からの「一括コピー」ができません。
それを実現するためのアドオンです。
Xuxen
ThunderPlunger
Requires Restart
Sorry but this addon is no longer supported in TB 60. See below.
This add-on provides a few new ways to keep Thunderbird clean.
Colorific
Colorize entire web pages. Configure themes using sliders and drag-and-drop. Set domain preferences for automatic coloration.
Outgoing Message Format
Requires Restart
Set the default outgoing message format to Auto-Detect, Plain Text Only, Rich Text (HTML) or Plain and Rich (HTML) Text.
JIRA Integration Plugin (Beta)
Requires Restart
Create Jira Tickets directly from within Mozilla Thunderbird (based on E-Mails). This Addons saves your Username and Password in clear text. Use on your own risk. (Also, you might need to disable the CSRF Filter in your JIRA Instance.)
Addons Quick Search
Requires Restart
Type first letters of add-on name to find them in the list or press Ctrl+↑/↓ to switch between add-ons categories.
Additionally remember and restore last selected item in each list.
Extension Auto-Installer
Important note: This extension will not work in Firefox 57 and above. Providing this functionality in Firefox is no longer possible, the extension is discontinued.
ThamiZha! Solthiruthi(Tamil spellchecker)
Tamil Spell checker by Thamizha.com Team.
Its creators include Ve. Elanjelian, S. Muguntharaj, Radhakrishnan, Vijay, A. Suji, Malathi Selvaraj, Sri Ramadoss, Yagna Kalyanaraman, Lavanya Sundararajan, Pranava Swaroop and Siddarth Vengatesan.
Window Master
Functionality for multiple screens and windows. Easily open links in other windows or on other screens, move or merge tabs, and move or merge entire windows. With graphical controls for grid positioning.
Send to Internals
Requires Restart
Provides a special button to send mail to internals. "Internals" may be company, organization, or user group and so on.
Return Receipt Toolbar Button
Requires Restart
Allow you to add a Return Receipt button to mail compose window toolbar.
To create your own collections, you must have a Mozilla Add-ons account.
