Message Composition

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✨ 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.

Rated 5 out of 5 stars (11)
5,381 users

ThunderAI (ChatGPT, Gemini, Ollama in your emails)

ThunderAI uses the capabilities of ChatGPT, Google Gemini, Anthropic or Ollama to enhance email management.
It enables users to analyze, write, correct, assign tags, create calendar events and tasks and optimize their emails.

Rated 5 out of 5 stars (18)
5,315 users

Attach from Clipboard

Create file attachments directly from the system clipboard.

Rated 4 out of 5 stars (32)
5,308 users

HTML Source Editor

Allows to edit the source of the currently composed message. A simple alternative to ThunderHTMLedit.

Rated 5 out of 5 stars (16)
4,354 users

SmartTemplates Featured

SmartTemplates offers an easy and powerful way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every mail identity, Stationery files can now be imported and used directly.

Rated 4 out of 5 stars (81)
3,575 users

Automatic Dictionary

Remembers the language you use with a person or group of people, and switches the spellchecker language automatically for you next time. You do not have to do it manually any more. It remembers and switches it for you.

Rated 5 out of 5 stars (50)
3,198 users

FileLink for Plik

Plik no longer offers uploads without an account. So the add-in currently only works for self-hosted instances of the software. Currently I cannot promise a date for a fix. Sorry.

Rated 5 out of 5 stars (4)
3,077 users

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.

Rated 4 out of 5 stars (16)
2,330 users

Send Later Button

The Send Later Button extension enhances Thunderbird by enabling 'Send Later' even in online mode. It supports many Languages, ensuring a seamless user experience.

See: https://github.com/That-Developer-Guy/Send-Later-Button-Thunderbird/

Rated 5 out of 5 stars (1)
2,135 users

ReFwdFormatter

Remove the ">" prefix from quote when you make a reply.

[Source code] https://github.com/isshiki/ReFwdFormatter

Rated 4 out of 5 stars (15)
2,125 users

Folder Account

Lets you associate user accounts and identities with specific folders. Great for multiple users who share TB, or for managing mailing lists.

Rated 4 out of 5 stars (64)
1,936 users

changeQuote

It's an extension that changes the format of reply header.
You can choose between the standard Thunderbird reply header, a detailed reply header or a Customized reply header.
You can configure it in the Tools ->Add-on Preferences -> changeQuote.

Rated 4 out of 5 stars (27)
1,826 users

Clippings for Thunderbird

Save frequently-entered text for pasting later.

Rated 4 out of 5 stars (8)
1,812 users

InsertSignature

Insert signature helps you to insert usually used text by your customization.

Rated 4 out of 5 stars (14)
1,790 users

Previous Colors

Quickly choose one of the previously selected colors for a message text

Rated 5 out of 5 stars (8)
1,708 users

Markdown Here Revival

A revival of the popular Markdown-Here addon for Thunderbird.

Markdown Here Revival is a Thunderbird extension that lets you write emails in Markdown and render them as HTML before sending.

Rated 4 out of 5 stars (18)
1,590 users

Copy Address

Copy email address to clipboard.

Rated 4 out of 5 stars (12)
1,583 users

S3 FileLink Provider

Uploads your large attachments to S3

Rated 2 out of 5 stars (2)
1,343 users

@Contact Mention

This add-on mimics the mentions behavior on Outlook when mentioning a contact with the '@' sign. The contact selected is added as a link in the email body as well as to the recipent list of the email.

Rated 4 out of 5 stars (10)
1,314 users

OpenPGP Alias Updater

Updates the local OpenPGP Alias file from a server to simplify encryption for mailing lists, or email aliases in an organizational environment.

Please make sure config parameter "mail.openpgp.alias_rules_file" is set to "openpgp_alias.json".

Rated 5 out of 5 stars (1)
1,220 users