Add-ons
Message and News Reading
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Additional Info for Simplelogin
For e-mails forwarded by Simplelogin, a pop-up displays the original sender of the e-mail, as well as the alias that the e-mail was sent to and the address that it was forwarded to.
Proton Mail Toolbar Button
Adds a Proton Mail button to the toolbar. The button simply opens a new tab with the https://mail.proton.me webpage.
Empty Folder
Adds a keyboard action (Ctrl+Del) and a folder context menu to delete all messages in a folder. Has a confirmation dialog to prevent accidental deletions
Quick Filter By
A simple extension that sets the Quick Filter based on the selected message fields. You can filter by either selecting "Quick Filter By" in the message list context menu or simply by alt-clicking on the message's sender, recipient or subject text.
Thunvatar
Adding a column with the favicon of sender's domain to the message list
Audio Preview
Adds a preview for audio files (wav, ..) to the message view, so it can be played directly.
Message List Preview
*Show a message preview in the subject field of the message list.
*Enlarge the subject column to display more text of the preview.
*Hover over subject to see even more preview in a tooltip.
*'Stripe' display of message list for clearer view.
PGP Universal
Fixes encrypted e-mail attachment names from PGP Universal servers
GIMPS Opener
Open Great Internet Mersenne Prime Search (GIMPS) 2ᴾ-1 exponent numbers.
Bug Opener
Open GitHub, GitLab, Bitbucket, Bugzilla and Jira bug/issue numbers.
Link Creator
Open selected URIs, URLs, e-mail addresses, telephone numbers and links.
Archive 3 Month
Archive messages that are older than 3 months in inbox and sent folder
Joplin Export
Export your emails from Thunderbird to Joplin. To use the add-on, a running Joplin application is required (https://joplinapp.org).
Please note that this is not an official product of the Joplin team, but rather developed by a private person.
Zivver for Thunderbird
This extension automatically detects Zivver messages and decrypts them on-the-fly using the Zivver API. Messages are decrypted only when actively displayed by the user and are never stored locally.
sms77
Autocopy 78+
Automatically copy any text in an email when the text is selected.
Safelinks Offr
If Advanced Outlook.com security for Microsoft 365 subscribers is turned on, many links are changed to be in the form of https://eur01.safelinks.protection.outlook.com/?url=https.... instead of the original link.
This add-on undos that process.
tbhints
Link hints for messages
This addon adds a keybinding (ctrl+shift+E) for displaying hints next to each link in an email message. Enter the hint text into the box at the bottom of the message to open that link in the system's default web browser.
Render Markdown Messages
This extension renders markdown-formatted messages as rich text. It preserves the fonts and formatting of plain text messages but adds support for markdown features like lists, code blocks, etc.
TabControlTo create your own collections, you must have a Mozilla Add-ons account.
