Add-ons
Message Composition
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SubSwitch
Simplify email categorization - it will be easier for you and others to manage mail. Define the set of prefixes for all emails you send or let SubSwitch to autodiscover it. While writing insert prefix to the title - choose one from your set.
FlexConfirmMail
Confirm mail address and attachments based on flexible rules.
(This project was renamed from "Flex Confirm Mail" to "FlexConfirmMail", due to a branding reason.)
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.
HTML Source Editor
Allows to edit the source of the currently composed message. A simple alternative to ThunderHTMLedit.
Simple Mail Redirection
Allows you to resend (also known as redirect) email messages.
Uses 'cardbook' if installed
Bases on the add-on 'Mail Redirect' by Onno Ekker and Pawel Krzesniak
Please see the support page on how to use and why it sometimes does not work!
Shrunked Image Resizer
Make your photos smaller, so they don't take forever to email.
*Shrunked Image Resizer is no longer maintained.*
Clippings for Thunderbird
Previous Colors
Identity Chooser
Identity Chooser helps you to always use the correct identity when composing a new email.
Textmarker
Highlights selected text when composing emails. Default colour is yellow - other colours are available via Options.
(Works only during writing an e-mail, i.e. only in the compose window.)
Grammar and Spell Checker — LanguageTool
Check your emails for spelling and grammar issues
✨ Awesome Emoji Picker ✨
Modern, nice emoji picker that you can use to find and select emojis. It will be copied to your clipboard or even directly inserted into the e-mail, when you click on it.
You will certainly like it.
Stationery
Requires Restart
Extension to mimic Outlook Express Stationery.
Allow you to use HTML files as templates for mail. Also allow custom template in replies or forwarded mail!
NestedQuote Remover
Emoji
It permits just with a single click to copy an emoji.
There is a search-box and the "Most used emojis" section (the first one).
If you want to send feedback or report bug, please go to https://github.com/Sav22999/emoji
FileLink Provider for Dropbox
Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.
Folder Account
Lets you associate user accounts and identities with specific folders. Great for multiple users who share TB, or for managing mailing lists.
FileLink provider for Send
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).
Markdown Here Revival
A revival of the popular Markdown-Here addon for Thunderbird 78 and beyond.
Markdown Here Revival is a Thunderbird extension that lets you write emails in Markdown and render them as HTML before sending.
EmojiTo create your own collections, you must have a Mozilla Add-ons account.
