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).
This extension allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.
Enigmail Requires Restart Featured
OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.
Saved Password Editor Requires Restart
Adds the ability to create and edit entries in the password manager.
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
Confirm-Address Requires Restart
Confirm E-mail address before sending mail
ShowIP Requires Restart
Show the IP address of the current page in the status bar. It also allows querying custom information services by IP (right click) and see location and avaiable vouchers for shopping sites. Additionally you can copy the IP address to the clipboard.
Master Password+ Requires Restart
Various enhancements for build-in "master password" (MP)
-Locks master security device on demand or after specified time
-Prompts for MP on browser startup
-Suppresses all or duplicate MP prompts
-Locks up entire application or individual windows
Asks for the master password at startup (fixes multiple password prompt)
FoxyProxy Basic Requires Restart
FoxyProxy Basic is a simple on/off proxy switcher. More advanced features and configuration options are offered by FoxyProxy Standard.
Auto Address Cleaner Requires Restart
Removes comment, display name automatically from addresses before sending mail.
Extended Cookie Manager - Keep only wanted cookies.
Flex Confirm Mail Requires Restart
Confirm mail address and attachments based on flexible rules.
Copy Folder Requires Restart
The missing Thunderbird "copy folder" feature! Copy folders or entire POP/IMAP accounts recursively to any location while maintaining folder structure.
Check and Send Requires Restart
Check the message contents and addresses before you send the message...
Allow HTML Temp Requires Restart
This Add-on allows to have HTML temporarily allowed in the currently displayed message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (if this is your default mode).
Fight back against advertising surveillance
This extension provides various customization options for the Adblock Plus user interface.