Add-ons
Appearance and Customization
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Calendar/Project Tools: Gantt-/Year View, Planner
*Display Gantt View and Year View
*Task Time Planning: daily, distribute your open tasks into open time slots.
*Show parent/child relationships for tasks
Disable DragAndDrop (New)
Disable drag and drop on the folder tree in order to prevent unintended folder movement.
Old (classic) Icons
This replaces the new monochrome icons with the old/classic colorful icons. Uses the code from Phoenity Icons and the graphics from older Thunderbird versions.
Darko
Simple dark mode (theme) for your Thunderbird messages.
FastAddons.com/#darko
Group Favorite Folders
An extension for Thunderbird 115+ that groups and sorts favorites folders in the compact view.
Lightning Calendar Tabs
Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.
Auto Profile Picture
Upgrade your Thunderbird experience with intelligent and clearer sender visualization that transforms how you identify and manage emails — making email management smoother and more intuitive.
tbkeys-lite
Custom Thunderbird keybindings
This add-on is a follow on to Keyconfig which is no longer supported.
It is aimed at power users. Please look at the GitHub site before leaving a one star review about documentation or usability.
Start with Inbox
Selects the latest message in the Inbox after start of Thunderbird.
New UNEC
New UNEC is a browser extension that transforms the UNEC student panel into a modern and user-friendly interface. It dynamically replaces the existing webpage’s HTML, CSS, and JS with an improved design, featuring automatic dark mode, language.
Get All Mail Button for TB78++
Adds a toolbar button to get all new messages for all accounts in Thunderbird. When clicked, it does the same as the default button "Get Messages" dropdown menu entry "Get All New Messages".
Send Unsent Mail Button
Search Button
Toolbar button to invoke message search dialog window.
Mark Button
Toolbar button to mark a message as read or unread with 1 click.
userChromeJS
Load the contents of chrome/userChrome.js from the user's profile directory every time a window is opened. Also add a toolbar button which reloads userChrome.js in the current window.
Toggle Address Box
Adds a Address Box button, toggles the Address Box in the Composer window
Toggle Summary
Toggle Inline
Toggle HTML
Toggle Message Pane
Adds a Preview Button, toggles the message preview
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