Add-ons
Message Composition
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*cloud - FileLink for Nextcloud and ownCloud
Upload large attachments to your Cloud and send the link by email
33,892 users -
SmartTemplates
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.
3,445 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.97,430 users -
Check your emails for spelling and grammar issues66,639 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft63,973 users -
Switch the signature on/off or choose a new one from your predefined set.49,060 users -
Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.45,504 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).44,595 users
Top Rated See all »
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Quickly choose one of the previously selected colors for a message text1,626 users -
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。
それを実現するためのアドオンです。433 users -
Macro Template is to replace mail templates with macros for date formatting.504 users
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Default "Reply" functionality pays attention to "Reply-To" in original email61 users
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Warns if you send mail from or to a specified domain. If there are multiple accounts in your profile, you can isolate one so that you can't send mail to that domain from outside or vis versa without warning.93 users
Recently Added See all »
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TO欄・CC欄に複数のメールアドレスがある場合の誤送信を防止します。送信前に自動的にチェックし、複数アドレスが検出された場合は警告を表示して送信を停止します。BCC欄の使用を推奨し、プライバシー保護を支援します。0 users -
Better reply to emails by extracting email addresses from the content of the message and allowing you to reply to them directly.
Made in collaboration with aski75.4 users -
LSP Rewrap cleans up plain-text emails by collapsing extra spaces, tabs, and other spacing issues—like older Thunderbird versions did. Use the toolbar button, Ctrl+Shift+R, or Tools → LSP-Rewrap while composing a plain-text message.10 users -
This add-on allows you to specify tags when composing a message, which are then assigned to the message saved in the Sent folder.8 users -
Adds a strikethrough toggle button to the Thunderbird compose toolbar. As this is an extension, it is not an integrated component of the Thunderbird toolbar. That is why it sits at the far right on the toolbar and not next to the B/I/U buttons.25 users -
Applies the correct smart quotes („ ... “ instead of " ... ") used in Lithuanian, German, Czech, and other Central European languages. One click fixes your entire text.3 users
See all 232 extensions in Message Composition »
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