Add-ons
Privacy and Security
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DKIM Verifier
Verifies the DKIM-Signature of an e-mail.
31,723 users
Most Popular See all »
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Create and Save or Send Multiple Individual and Personalized Messages from a Draft78,204 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).50,674 users -
Check the message contents and addresses before you send the message...18,046 users -
Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).15,479 users
Top Rated See all »
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Adds the ability to create and edit entries in the password manager.140 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"4 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft78,204 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.493 users -
Removes comment, display name automatically from addresses before sending mail.191 users
Recently Added See all »
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Thunderbird Cert Medic Free scans saved SSL/TLS certificate exceptions, identifies orphaned entries, and safely cleans one eligible exception at a time with verified backup and Undo.0 users -
Browser Profile Router opens links in the browser profile that belongs to the email account a message was received on. So links from personal email open in browser profile signed in with personal email and ones from work email open in work profile.1 user -
When attaching a file, subtly asks if the content should be encrypted. The file is packaged into an HTML file that self-decrypts using the passphrase. Runs entirely locally.2 users -
Traffic Light Protocol 2.0 (TLP 2.0): Marks emails according to the Traffic Light Protocol, including an additional CONFIDENTIAL level, directly in the Thunderbird compose window.2 users -
Forensic toolkit for Thunderbird: load emails by scope, review & tag, build timelines & bundles, and verify headers, hashes & EXIF metadata locally.0 users -
Never lose a tab again — one click vaults your open tabs, organized and searchable.1 user
See all 256 extensions in Privacy and Security »
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