Add-ons
Privacy and Security
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DKIM Verifier
Verifies the DKIM-Signature of an e-mail.
16,157 users
Most Popular See all »
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Create and Save or Send Multiple Individual and Personalized Messages from a Draft68,400 users -
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).36,605 users -
Check the message contents and addresses before you send the message...21,621 users -
Confirm mail address and attachments based on flexible rules.
(This project was renamed from "Flex Confirm Mail" to "FlexConfirmMail", due to a branding reason.)17,973 users
Top Rated See all »
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Remove comment, display name from addresses before sending mail.
This add-on is a fork of Auto Address Cleaner.
https://addons.thunderbird.net/thunderbird/addon/auto-address-cleaner/9,061 users -
Finally, an efficient blocker. Easy on CPU and memory. uBlock Origin (uBO) is a CPU and memory-efficient wide-spectrum content blocker that blocks ads, trackers, coin miners, popups, annoying anti-blockers, etc. in your feeds.5,884 users -
Adds the ability to create and edit entries in the password manager.266 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"6 users -
Create and Save or Send Multiple Individual and Personalized Messages from a Draft68,400 users
Recently Added See all »
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vault56 protection protects against potentially malicious attached files and links. Links are rewritten to pass through vault56 URL protection servers and checked for trackers and malicious activity.24 users -
Finally, an efficient blocker. Easy on CPU and memory. uBlock Origin (uBO) is a CPU and memory-efficient wide-spectrum content blocker that blocks ads, trackers, coin miners, popups, annoying anti-blockers, etc. in your feeds.5,884 users
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Just Verify It is a Thunderbird add-on that automates the scanning of email attachments with VirusTotal for malware. With over 50 antivirus engines, it provides reliable and quick results, ensuring the safety of your digital assets.209 users -
New Bing isn't just for Edge anymore. Anywhere you want44 users -
Encrypt any file, any text, and share via any medium, any time30 users
See all 175 extensions in Privacy and Security »
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