アドオン
メール作成／編集
後で送信
Mail Merge
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
Grammar and Spell Checker — LanguageTool
Check your emails for spelling and grammar issues
FileLink Provider for Dropbox
Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.
Signature Switch
Switch the signature on/off or choose a new one from your predefined set.
Exchange用のフクロウ
FileLink provider for Send
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).
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.)
*cloud - FileLink for Nextcloud and ownCloud
おすすめ
Upload large attachments to your Cloud and send the link by email
Emoji
FlexConfirmMail
柔軟なルールに基づいて、宛先のメールアドレスや添付ファイルに対する確認を表示する事ができます。
（ブランディングの都合により、このプロジェクトは「Flex Confirm Mail」（スペースあり）から「FlexConfirmMail」（スペース無し）に名称変更されました。）
FileLink Provider for Box
Uploads your large attachments to your Box instead of sending them by email.
Shrunked Image Resizer
Make your photos smaller, so they don't take forever to email.
*Shrunked Image Resizer is no longer maintained.*
ReplyWithHeader
Simple Mail Redirection
CategoryManager
Category manager for Thunderbird contacts, also allows to send an email to all members of a category (categories can be used as contact groups).
BorderColors D
Shows a colorful border around the "New Message" window, so you can tell different identities apart.
Builds on the original BorderColors and the "GT" version, adding different border styles.
Identity Chooser
Identity Chooser helps you to always use the correct identity when composing a new email.
Attach from Clipboard自分のコレクションを作成するには Mozilla アドオンサイトのアカウントが必要です。
あるいは 既存のアカウントへログイン
