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.
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
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
Saved Password Editor Requires Restart
Adds the ability to create and edit entries in the password manager.
Extended Cookie Manager - Keep only wanted cookies.
Asks for the master password at startup (fixes multiple password prompt)
Confirm-Address Requires Restart
Confirm E-mail address before sending mail
FoxyProxy Basic Requires Restart
FoxyProxy Basic is a simple on/off proxy switcher. More advanced features and configuration options are offered by FoxyProxy Standard.
Website Blocker Requires Restart
Block websites you don't want the browser to get into.
Block by a whole domain name or a specific address.
Block until further notice or until a certain date.
Block ads and manage proxy.
Deny resource:// access to Web content: We fill the hole to defend against fingerprinting. Very important to Firefox privacy. A direct workaround for bugzil.la/863246
Fight back against advertising surveillance
GProxy Tool Requires Restart
GProxy lets you set and clear GPass local proxy in Firefox and Thunderbird, and do more.
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.
Check and Send Requires Restart
Check the message contents and addresses before you send the message...
MEGAbird Requires Restart
Add MEGA support to Thunderbird's Filelink feature.