Like the luxury compilation Mozilla Firefox, here is best located for the client messenger ons Thunderbird. Icon by Bolazzz Rocketdock icon punklabs.com
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).
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.
FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.
United States English Spellchecker for Firefox, Thunderbird and SeaMonkey by Kevin Atkinson and Geoff Kuenning.
To enable, right-click in a multi-line text box, select "Languages", then "English (United States)".
OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.
FoxyProxy Basic is a simple on/off proxy switcher. More advanced features and configuration options are offered by FoxyProxy Standard.
FoxClocks shows times around the world - or just your local time - at the bottom of your browser. It deals with daylight saving time so you don't have to.
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!
Displays the address books in a sidebar in Thunderbirds 3-pane-window and can be toggled with the F4 key or a toolbar button.
Visit my Contacts Sidebar site for recent versions and news.
Walnut2 for Thunderbird, based on icons from art.gnome.org. Walnut2 is based on Walnut but with better looking wood panels. Fully compatible with from 5.0 upto latest nightly build (currently 27.0a1). Full support for Lightning/calendar.
Walnut for Thunderbird, based on icons from art.gnome.org, and sporting a wooden look. Fully compatible with from 5.0 upto latest nightly build (currently 27.0a1). Full support for Lightning/calendar.
Display birthdays from the Thunderbird addressbooks as events in Lightning.
Dark-colored minimalistic theme with emphasis on visibility, usability and maximum screen real estate.