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
39,482 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.
3,786 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.118,474 users -
Check your emails for spelling and grammar issues75,312 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft73,626 users -
Switch the signature on/off or choose a new one from your predefined set.54,262 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).52,552 users -
Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.50,000 users
Top Rated See all »
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Quickly choose one of the previously selected colors for a message text1,890 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。447 users -
Macro Template is to replace mail templates with macros for date formatting.554 users
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Default "Reply" functionality pays attention to "Reply-To" in original email63 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.96 users
Recently Added See all »
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The add-on enhances your email inbox experience through AI (LLM) support.3 users -
Manage and insert customized email templates with attachments directly from the compose window.12 users -
Quill lets you integrate AI writing assistance (Ollama, OpenAI, or Claude) to help you write or respond to emails un Mozilla Thunderbird.6 users -
Claify est une extension Thunderbird qui intègre l'intelligence artificielle Claude (Anthropic) directement dans votre client email. Résumez, traduisez, corrigez et rédigez vos emails en un clic.
Fait avec ❤️ par Supersonique Studio4 users -
Highly-customizable and performant extension for @-mentions inside Thunderbird.21 users
See all 276 extensions in Message Composition »
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