Add-ons
Privacy and Security
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DKIM Verifier
Verifies the DKIM-Signature of an e-mail.
27,698 users
Most Popular See all »
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Create and Save or Send Multiple Individual and Personalized Messages from a Draft75,411 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).52,369 users -
Confirm mail address and attachments based on flexible rules.
This is enterprise edition with less updates. Another edition for regular users:
https://addons.thunderbird.net/thunderbird/addon/flex-confirm-mail/24,852 users -
Check the message contents and addresses before you send the message...20,147 users
Top Rated See all »
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Adds the ability to create and edit entries in the password manager.155 users -
Adds optional columns to the Thread Pane to allow sorting email messages by:
* Full sender address -- e.g. "someone@example.com"
* Sender's domain -- e.g. "example.com"
* Sender's local part -- e.g. "someone"
* Sender's TLD -- e.g. ".com"5 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft75,411 users
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Users of outlook.com and o365 who have Advanced Thread Protection enabled will have all URL's in emails changed to redirect them to an Microsoft filter before opening. This is a bad idea.
This plugin will change the URL back to the original value.755 users -
Removes comment, display name automatically from addresses before sending mail.216 users
Recently Added See all »
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Reveals real destinations of obfuscated email security links and shortened URLs with privacy-preserving resolution.1 user -
Spam Master brings real-time spam and threat protection to Thunderbird by connecting with the Spam Master SaaS platform. Automatically filters unwanted emails and keeps your inbox clean.0 users -
Quickly report abuse for unsolicited emails by creating a clean abuse report with raw headers attached. One click, fast and reliable.10 users -
Detect tracking pixels, tracking links, and external images in Thunderbird emails.48 users -
This extension disables all links included in email messages to prevent unintended links to phishing sites. In HTML emails, all links will be disabled, including those embedded in buttons and images.6 users
See all 204 extensions in Privacy and Security »
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