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GuifiProxy
Requires Restart
Simple proxy manager
- Change proxy with two clicks
- Import and export proxies lists
- Manually add, delete and edit proxies
- Automatic authentication on proxies (bypass popup with login and password)
- Proxysel replacement
AutoProxy
Requires Restart
Are you concerned about your privacy? Or, are you blocked from some websites by a firewall? And, are you arming yourself with a proxy? In that case, AutoProxy is designed for you! A tool to help you use your proxy automatically & efficiently.
Bluhell Firewall
Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.
TorBirdy
Requires Restart
This extension configures Thunderbird to make connections over the Tor anonymity network.
CookieKeeper
Stego Block
Requires Restart
Embeds a small secondary, encrypted message in an email, known as a Stego Block.
QuickPasswords
Requires Restart
Retrieve your Passwords the quick way! Never retype or display your secure passwords on screen anymore - put the password where you need it - the login form or the clipboard.
Now also includes SSO change (multi-domain pw) and Backup + Restore.
Certificate Patrol
Requires Restart
Your browser trusts many certification authorities and intermediate sub-authorities quietly, every time you enter an HTTPS web site. This add-on reveals when certificates are updated, so you can ensure it was a legitimate change.
Export All Certificates
Paranoia
Check if your emails arrived TLS-encrypted (and which corporations were able to read it nevertheless)
TracEmail
Requires Restart
A tool to raise awareness on email privacy. Visualizes the estimation of the path of your email messages on an interactive map. You can see which countries might have taken a copy of the message.
Great DANE
Requires Restart
Retrieve DANE S/MIME Certificates for Encryption/Signing.
This extension enables users to automatically retrieve S/MIME certificates using the Great DANE Engine (https://github.com/grierforensics/Great-DANE-Engine).
Change Referer Button
Requires Restart
Button in the toolbar/status bar to change referer value.
PrivaConf
ReloadPAC
Requires Restart
Workaround for Bug 351163 (Thunderbird bypasses proxy.pac for first connection).
Lock The Text
Requires Restart
Encrypt your text data in browser before you submit it to a network
kurl - YOURLS Shortener
Quickly shorten links with your self-hosted YOURLS instance. Provides a toolbar button, context menu, and keyboard shortcut for a fast workflow.
PhishGuard
AI-powered email phishing detection using a private, local LLM. No data leaves your device.
Supported Local LLM Providers:
- Ollama
- LM Studio
- llama.cpp server
- vLLM
- etc.
ATN-XPIHandler
Basic extension to support add-on installation from addons.thunderbird.net, without requiring the privileged mozAddonManager API.
DMARC Report Analyzer
Analyze DMARC aggregate and forensic reports locally within Thunderbird. Visualize authentication results per domain, classify source IPs, detect threats, track DKIM/SPF/envelope alignment, and export data. Fully offline with zero network requests.
To create your own collections, you must have a Mozilla Add-ons account.
