Add-ons
Message Composition
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*cloud - FileLink for Nextcloud OpenCloud ownCloud
Upload large attachments to your Cloud and send the link by email
37,545 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.
3,726 users
Most Popular See all »
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True "Send Later" functionality to schedule the time for sending an email.118,332 users -
Check your emails for spelling and grammar issues74,353 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft73,636 users -
Switch the signature on/off or choose a new one from your predefined set.53,106 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.)50,598 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).50,450 users
Top Rated See all »
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Quickly choose one of the previously selected colors for a message text1,765 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。429 users -
Macro Template is to replace mail templates with macros for date formatting.582 users
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Default "Reply" functionality pays attention to "Reply-To" in original email54 users
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Create and Save or Send Multiple Individual and Personalized Messages from a Draft73,636 users
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Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).39,460 users
Recently Added See all »
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Thunderbird's built-in reminder checks one language with a fixed list. This warns in 9 languages, lets you add your own trigger words, and only interrupts right before sending.2 users -
A Thunderbird extension that integrates AI assistance directly into the compose window, letting users draft replies, fix grammar, translate text, and adjust tone without leaving the email client.2 users -
Paste Markdown (GitHub Flavored) into a Thunderbird compose window and see it rendered as formatted rich text instantly. Also includes a toolbar button to render/un-render the whole draft.3 users -
Auto sentence casing
Dictionary-based replacements
Superscript conversion for units and ordinals
Fraction convrsion
Degree symbol conversion
Diameter symbol conversion
Smart spacing adjustments
User-configurable settings and custom dictionary1 user -
Automatic out-of-office reply: custom text, account(s), date window. Note: only works while Thunderbird is running.27 users
See all 330 extensions in Message Composition »
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