Auto Resize Image 需要重新啟動
Resizer for inline and attachment images (JPEG, PNG, BMP and GIF image formats).
All platforms are supported (Windows, Linux and Macintosh).
Mail Merge 需要重新啟動 精選
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
Signature Switch 需要重新啟動
Switch the signature on/off or choose a new one from your predefined set.
Add MEGA support to Thunderbird's Filelink feature.
Extension to mimic Outlook Express Stationery.
Allow you to use HTML files as templates for mail. Also allow custom template in replies or forwarded mail!
ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) e delle comunicazioni PCT e FatturaPA in Thunderbird.
Add emojis to your e-mails.
Check and Send 需要重新啟動
Check the message contents and addresses before you send the message...
SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every account as well as for the default (all email accounts). Also supports the Stationery Add-on.
Remembers the language you use with a person or group of people, and switches the spellchecker language automatically for you next time. You do not have to do it manually any more. It remembers and switches it for you.
Send Later Button 需要重新啟動
A simple button to invoke the (already existing) send later functions.
Flex Confirm Mail 需要重新啟動
Confirm mail address and attachments based on flexible rules.
Nextcloud for Filelink 需要重新啟動
"Nextcloud for Filelink" is an Open Source Thunderbird extension which makes it easy to send large attachments with Thunderbird by uploading them first to a Nextcloud server and by then inserting the link into the body of your email.
Thunderbird HTML editor. This add-on adds a HTML tab to the composition window where you can see and edit the HTML source of the message.
Markdown Here 需要重新啟動
Category manager for Thunderbird contacts, also allows to send an email to all members of a category (categories can be used as contact groups).
Emoji Menu 需要重新啟動
Adds the ability to easily insert emojis into your composed messages in Thunderbird.
Shrunked Image Resizer 需要重新啟動
Make your photos smaller, so they don't take forever to email.
Grammar Checker 需要重新啟動
Checks grammar using LanguageTool.