Add-ons
Privacy and Security
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DKIM Verifier
Verifies the DKIM-Signature of an e-mail.
27,729 users
Most Popular See all »
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Create and Save or Send Multiple Individual and Personalized Messages from a Draft73,746 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).51,113 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/22,752 users -
Check the message contents and addresses before you send the message...18,743 users
Top Rated See all »
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Adds the ability to create and edit entries in the password manager.152 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 Draft73,746 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.633 users -
Removes comment, display name automatically from addresses before sending mail.202 users
Recently Added See all »
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Open Security Deadlines (https://sec-deadlines.github.io/) in a Thunderbird Tab. No affiliation with the original website.2 users
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Basic extension to support add-on installation from addons.thunderbird.net, without requiring the privileged mozAddonManager API.12 users
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Browser Extension to bulk delete and archive ChatGPT chats.3 users -
Finally, an efficient blocker, now for Thunderbird! Easy on CPU and memory.18 users
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MailCheck helps prevent accidental email leaks by checking recipient domains before sending. Can be configured to warn & allow users to deny when email messages include non-allowed domains or prohibited domains.4 users -
Dieses Addon kennzeichnet Spoof- und Spam-Mails basierend auf SPF, DKIM, DMARC und Header-Analyse. Die Markierung erfolgt in Form eines Banners im E-Mail-Fenster.4 users
See all 220 extensions in Privacy and Security »
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