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
37,476 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.
3,634 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.114,515 users -
Check your emails for spelling and grammar issues73,701 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft71,427 users -
Switch the signature on/off or choose a new one from your predefined set.53,378 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).50,881 users -
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.)49,078 users
Top Rated See all »
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Quickly choose one of the previously selected colors for a message text1,813 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。414 users -
Macro Template is to replace mail templates with macros for date formatting.539 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.97 users -
Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).44,622 users
Recently Added See all »
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Sets a default font of your choice for every new composed e-mail.1 user -
Add images via clipboard, drag & drop, or file import. Resize and convert image files to JPGs, automatically rename and number them. Sort, rotate, or edit your image attachments. All within the jpg-attacher add-on window.3 users -
The add-on enhances your email inbox experience through AI (LLM) support.8 users -
Manage and insert customized email templates with attachments directly from the compose window.23 users -
Quill lets you integrate AI writing assistance (Ollama, OpenAI, or Claude) to help you write or respond to emails un Mozilla Thunderbird.8 users
See all 278 extensions in Message Composition »
To create your own collections, you must have a Mozilla Add-ons account.
