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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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
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Warns when opening an email if the sender, links or attachments look unsafe. Everything runs locally. Suspicious emails can be reported to your own IT, newsletters from senders can be unsubscribed, and you are warned before replying to forged emails.7 users
See all 262 extensions in Privacy and Security »
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