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.
Adds some tools to import and export folders and messages
Access to Google contacts and synchronize them with Thunderbird address books.
Synchronizes contacts & groups between Thunderbird or SeaMonkey and Google Contacts. Imports Facebook friends, contacts you follow on Twitter, and more.
Allows URI texts written in webpages to be loaded by double clicks.
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.
Clears preferences left by extensions after uninstallation
Enable the View | Message Body As | All Body Parts message display mode.
Displays a small graphic visualising the context (thread) of the currently selected email.
Displays the contact photo/image/picture of the sender/recipient while reading or composing a message. Supports photos in a local folder and the 'Face' header for embedded photos. The add-on adds new generic photos and many styling possibilities.
Allow you to add a Return Receipt button to mail compose window toolbar.
MailHops maps the route an email took to get to you. Displaying the senders location in the mail headers box. Click on the sender location to view a map of the mail route.