Add-ons
Privacy and Security
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DKIM Verifier
Verifies the DKIM-Signature of an e-mail.
25,894 users
Most Popular See all »
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Create and Save or Send Multiple Individual and Personalized Messages from a Draft68,713 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).49,071 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/20,599 users -
Check the message contents and addresses before you send the message...17,694 users
Top Rated See all »
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Adds the ability to create and edit entries in the password manager.166 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 Draft68,713 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.723 users -
Removes comment, display name automatically from addresses before sending mail.203 users
Recently Added See all »
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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.1 user -
Thunderbirdで迷惑メール・フィッシングメールを検出し、日本の報告機関に報告を行います（フィッシング対策協議会 https://www.antiphishing.jp/ 迷惑メール相談センター https://www.dekyo.or.jp/soudan/ 向けに添付した報告メールを作成します。VirusTotal、Google Safe Browsing、PhishTank対応。危険検出時に自動レポート作成。信頼できるドメインデータベース＋ホワイトリスト機能付き4 users -
Thunderbird Pro gives you an email address, appointment scheduling, and the ability to send large files with end-to-end encryption. It’s part of our effort to build services offering privacy-respecting alternatives to the platforms widely used today.11 users -
Automatically manage emails with expiration dates. Delete or move expired emails to reduce storage and environmental impact. Part of the Zero Carbon Email initiative.13 users -
Automatically fills my username, TOTP code, and password on weblogin.lancs.ac.uk.
You should enter your username, password, and TOTP secret in the options page before using this extension.1 user -
Guard against spoofed emails by comparing display name and domain.1 user
See all 199 extensions in Privacy and Security »
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