Privacy and Security
Adblock Plus Featured
Blocks annoying video ads on YouTube, Facebook ads, banners and much more.
Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
Saved Password Editor Requires Restart
Adds the ability to create and edit entries in the password manager.
Identity Chooser Requires Restart
Identity Chooser helps you to always use the correct identity when composing a new email.
Password Tags Requires Restart
Adds metadata and sortable tags to the password manager.
Block ads and manage proxy.
Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.
Mail Merge Requires Restart Featured
Mass Mail and Personal Mail
This extension provides various customization options for the Adblock Plus user interface.
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.
한국 웹의 광고를 효율적으로 차단합니다.
TrayHotKey Requires Restart
Minimum and fast URL blocker.
S/MIME Security for Multiple Identities Requires Restart
Adds S/MIME Security configuration to the multiple identities dialog.
Meanwhile this feater has been integrated into Thunderbird 3
POW -- Plain Old Webserver Requires Restart
Turn the web on its head with the Plain Old Webserver (POW), which adds a server to your browser.
Encrypt if possible Requires Restart
Sets message security option "encrypt message", if valid X509 certificates are found for all recipients.
Secure Addressing Requires Restart
This add-on provides features to avoid sending emails to wrong addresses. Key features are a confirmation window of recipient's addresses upon sending, name and affiliation look up at mail composition and main windows, and safe auto completion.
Change Referer Button Requires Restart
Button in the toolbar/status bar to change referer value.
Auto Address Cleaner Requires Restart
Removes comment, display name automatically from addresses before sending mail.
Lock The Text Requires Restart
Encrypt your text data in browser before you submit it to a network