My favorite Thunderbird add-ons, contains the best in security, privacy, and utilities Don't install a lot of add-ons as it will slow application start time, use more memory, and more CPU.
Adblock Edge is a fork of the Adblock Plus version 2.1.2 extension for blocking advertisements on the web, without sponsored ads whitelist.
**This addon will be discontinued on June 2015**
Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.
The most lightweight and easiest translator. Translate between more than 80 languages with one click or a hot key. Translate from one word to a whole page.
Theme for Firefox and Thunderbird
Based on Noia Iconpack by Carlitus (deviantART)
Noia Fox options is here (small icons, square tabs,...).
Notifier for gmail, yahoo, hotmail, aol and more webmails.
X-notifier(aka WebMail Notifier) checks your webmail accounts and notifies the number of unread emails...
Supports : gmail, yahoo, hotmail, POP3/IMAP, facebook, twitter and more
Simple and secure password management. Login automatically, never forget another password, stay in control of your passwords and improve their security. Powered by the world-renowned KeePass Password Safe.
Adds the ability to create and edit entries in the password manager.
Scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled).
True "Send Later" functionality to schedule the time for sending an email.
It adds some options to launch easily other profiles and the Profile Manager.
Did your friend send you a cool link? Want to read the rest of that interesting article? Don't want to open up your web browser just to view it? You don't have to! Just view it in Thunderbird with ThunderBrowse!
Enables desktop notifications like in Chrome (e.g. Gmail, imo.im) and, if the site doesn't support them, it can notify new messages or updates detecting changes of the title (e.g. Hotmail, Yahoo, Facebook, Twitter). Even if the browser is minimized!