Add-ons
Message Composition
-
*cloud - FileLink for Nextcloud and ownCloud
Upload large attachments to your Cloud and send the link by email
39,431 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.
3,841 users
Most Popular See all »
-
True "Send Later" functionality to schedule the time for sending an email.121,340 users -
Check your emails for spelling and grammar issues76,702 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft76,456 users -
Switch the signature on/off or choose a new one from your predefined set.55,658 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).53,105 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.)51,540 users
Top Rated See all »
-
Quickly choose one of the previously selected colors for a message text1,925 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。449 users -
Macro Template is to replace mail templates with macros for date formatting.583 users
-
Default "Reply" functionality pays attention to "Reply-To" in original email62 users
-
Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).44,236 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft76,456 users
Recently Added See all »
-
MailCheck helps prevent accidental email leaks by checking recipient domains before sending. Can be configured to warn & allow users to deny when email messages include non-allowed domains or prohibited domains.0 users
-
ToneCraft is a Thunderbird extension that detects (and blocks) unprofessional language in outgoing emails and suggests polite alternatives with AI.
It helps you maintain a courteous tone and avoid accidental rudeness.0 users -
Inline grammar suggestions while composing email. You bring your own LLM via an Open AI-compatible provider, including local LLM; tested with LM Studio on Ubuntu and together.ai Defaults to google/gemma-3n-E4B-it1 user -
Paste clipboard images inline in Thunderbird with PNG, JPG, or automatic format selection.5 users -
Sets a default font of your choice for every new composed e-mail.9 users -
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.8 users
See all 283 extensions in Message Composition »
To create your own collections, you must have a Mozilla Add-ons account.
