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!
Emoji Menu Requires Restart
Adds the ability to easily insert emojis into your composed messages in Thunderbird.
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.)
Lets you associate user accounts and identities with specific folders. Great for multiple users who share TB, or for managing mailing lists.
Typical Reply Requires Restart
Provides ability to send/receive typical replies in a team.Provides ability to send/receive typical replies in a team.
Remove the ">" prefix from quote when you make a reply.
[Source code] https://github.com/isshiki/ReFwdFormatter
Address bulk copy （アドレス一括コピー） Requires Restart
Thunderbird は Outlook のようにアドレス全選択からの「一括コピー」ができません。
Custom Address Sidebar Requires Restart
Allow you to help address sidebar more useful.
ThunderPEC Requires Restart
ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) e delle comunicazioni PCT e FatturaPA in Thunderbird.
Auto Resize Image Requires Restart
Resizer for inline and attachment images (JPEG, PNG, BMP and GIF image formats).
All platforms are supported (Windows, Linux and Macintosh).
Remove nested quotes when replying to a mail.
Grammar Checker Requires Restart
Checks grammar using LanguageTool.
Uploads your large attachments to your OwnCloud or NextCloud server and instead inserts a public link into your email.
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.
Save your email into Evernote by forwarding it to Evernote email address.
Before you use it, you need to specify your Evernote email address (see the screenshot).
This function can be invoked by "Forward to Evernote" in the context menu.
Insert signature helps you to insert usually used text by your customization.
Copy email address to clipboard.
Help in reminding mails to be answer or sent again. Choose a reminder date for each received or send message that are highlighted in the message list, depending on their status (expired, soon to exprire, to be reminded). Sending a reminder is eased.
Nextcloud for Filelink Requires Restart
"Nextcloud for Filelink" is an Open Source Thunderbird extension which makes it easy to send large attachments with Thunderbird by uploading them first to a Nextcloud server and by then inserting the link into the body of your email.