SubSwitch Requires Restart
Simplify email categorization - it will be easier for you and others to manage mail. Define the set of prefixes for all emails you send or let SubSwitch to autodiscover it. While writing insert prefix to the title - choose one from your set.
Nextcloud for Filelink Requires Restart
"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.
Reply As Original Recipient Requires Restart
Reply with the From: field set to the To: field from the original email.
Colored Recipient Type Requires Restart
Customize background-color of the recipient address fields for each recipient types of To:, Cc:, Bcc:.Customize background-color of the recipient address fields for each recipient types of To:, Cc:, Bcc:.
Smart Quotes Requires Restart
Enables “Smart” Quotes for Thunderbird Email
mms Auto Correct Requires Restart
AutoCorrect for the Compose window.
Reply to All as Cc Requires Restart
Send a reply for recipients as CC except the sender, when you do "Reply to All".
SendToSecondEmail Requires Restart
This Extension lets you send Mails to both, first and second email address...
QFO - Quick Fuck Off Requires Restart
This extension serves the purpose of providing instant access to the FOAAS web service. FOAAS (Fuck Off As A Service) provides a modern, RESTful, scalable solution to the common problem of telling people to fuck off.
MultiLDAP2 Requires Restart
Based on TrustedBird/MiliMail work. Patched to work with lastest Thunderbird.
Permits to use several LDAP directories simultaneously for address autocompletion.
Send Later Button Requires Restart
A simple button to invoke the (already existing) send later functions.
FastCC Requires Restart
A Thunderbird extension that let you switch to cc: with the ALT+CTRL+C keyboard shortcut!
HtmlHighlightr Requires Restart
Provides source code highlighting in editor's "Insert HTML" dialog.
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.
Reply To All Reminder Requires Restart
Asks for confirmation when "Reply" instead of "Reply to All" is pressed on an email with multiple recipients.
Insert Link from Local File Requires Restart
Inserts links from local files via drag and drop on the composition window.
Check Attachment before Send Requires Restart
Confirms to send a mail with any attachment.
Grammar Checker Requires Restart
Checks grammar using LanguageTool.
Flex Confirm Mail Requires Restart
Confirm mail address and attachments based on flexible rules.
Highlight External Addresses Requires Restart
This extension helps to warn the user when composing a message to a mixed group of people both in and out of the sender's organization. External addresses are highlighted in orange as a reminder.