Add-ons
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Safe Trash Cleaner
Empties trash, junk and selected folders of selected Thunderbird accounts after confirmation.
Gemini Watermark Remover
Download Gemini AI-generated images without a watermark.
Clippings for Thunderbird
Save frequently-entered text for pasting later.
10ten Japanese Reader (Rikaichamp)
Look up Japanese words with the hover of a mouse.
After enabling the add-on from the toolbar (or press Alt+R) simply hover over Japanese text and a popup displays corresponding dictionary definitions.
Thunderbird Pro
Thunderbird Pro gives you an email address, appointment scheduling, and the ability to send large files with end-to-end encryption. It’s part of our effort to build services offering privacy-respecting alternatives to the platforms widely used today.
AutoCopy Send
Adds an extra Send button to the compose window that automatically copies the message to a configured list of CC and/or BCC addresses (e.g. a CRM logging address, a team archive mailbox, or a manager).
Addy.io Recipient Converter
Converts recipients using the identity reply-to address on send to the format required by addy.io. If the reply-to field is empty, does nothing. If populated, transforms recipient address(es) (i.e. TOs, CCs, and BCCs) based on the reply-to address.
AI Mail Support
Add-on designed to enhance email management for both personal and professional use, integrating a set of adanced AI (LLM) features to optimize the email management experience.
Drop Attachment 拖放添加附件
Drag and drop files from your file manager directly into the compose window to add them as attachments.
从文件管理器或桌面直接将文件拖拽到写邮件窗口中，即可将其添加为附件，无需再点击附件按钮逐级查找文件。
Daily Reports
This plugin lets you store different profiles with CC, To, Subject and Signature values. Perfect if you need to send emails with similar details often.
Spoof Detector
Dieses Addon kennzeichnet Spoof- und Spam-Mails basierend auf SPF, DKIM, DMARC und Header-Analyse
eMail Address Finder
Find all email addresses in Body, From, & CC fields.
Simply click a menu item to copy an address.
Extract, deduplicate, copy email addresses from To, Cc, From, & message body in one menu. Quick copy actions, filtering excluded addresses/domains.
Display Name + Domain Guard
Check spoof-like emails by comparing sender display names and domains.
VFS-Provider: Local Home Folder Access
A VFS provider add-on that enables WebExtensions using the VFS Toolkit to access the user's local home folder through a native messaging helper application.
Check Links
NC Connector for Thunderbird
NC Connector brings Nextcloud Talk meetings, secure file shares, intelligent attachment automation, and centrally managed email signatures directly into Thunderbird.
Reviewed-by button
A Thunderbird MailExtension that adds an `R-b` button to the compose window and inserts a `Reviewed-by:` line for the currently selected sender identity at the current cursor position.
Retyc
Encrypt and upload large files with to Retyc. Recipients with a Retyc account get E2E encryption; others access files using a passphrase.
Undo Send Notification
Delays sending an email and provides a notification to undo it.
VFS-Provider: OneDrive
A VFS provider add-on that enables WebExtensions using the VFS Toolkit to access files on a OneDrive folder.
To create your own collections, you must have a Mozilla Add-ons account.
