Add-ons
Privacy and Security
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DKIM Verifier
Verifies the DKIM-Signature of an e-mail.
29,762 users
Most Popular See all »
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Create and Save or Send Multiple Individual and Personalized Messages from a Draft73,993 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).48,712 users -
Check the message contents and addresses before you send the message...18,505 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).14,750 users
Top Rated See all »
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Adds the ability to create and edit entries in the password manager.136 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 Draft73,993 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.459 users -
Removes comment, display name automatically from addresses before sending mail.200 users
Recently Added See all »
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Apply Duck relay addresses while composing email in Thunderbird.3 users -
Przekazuje podejrzana wiadomosc do CERT Polska jako zalacznik .eml.10 users -
Warns before sending messages from an account to configured prohibited email addresses or domains.3 users -
Analyzes To and Cc recipients in the Thunderbird compose window.1 user
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Alberich Mail Companion is the slim mail add-on to alberich.pro. Type in the compose window, open Alberich, done. Incoming ciphertext decrypts from the message you are reading; the stored mail is never changed. Everything stays local.1 user -
Entra ID SSO for Thunderbird on Linux. A native messaging host bridges to the local microsoft-identity-broker, reusing the device SSO session for Microsoft 365 / Exchange (Conditional Access outside Edge). Companion host required.3 users
See all 252 extensions in Privacy and Security »
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