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.
Allows bidirectional access to Google Calendar
Access to Google contacts and synchronize them with Thunderbird address books.
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.
If you have duplicate messages (e.g. from merging folders or downloading messages several times) you can use this tool to find and remove them from the selected folder and its subfolder by rightclicking on a folder and choosing "Remove duplicates..."
Google and Zimbra contact sync for Thunderbird. (TB 24 and above NOT supported)
Facilitates handling of duplicates in your address book(s). Allow to search and remove similar contacts.
Note from Mozilla: This add-on has been discontinued. Try MinimizeToTray Revived instead.
Minimize applications to the system tray.
Automatically fill your address books or send mass mails with e-mail addresses extracted from all your e-mails.
Minimizes Mozilla windows into the system tray. Also includes a right clickable tray icon menu to further load only the windows you want visible...
Removes comment, display name automatically from addresses before sending mail.
English-Greek spell-checking dictionary for Firefox, Mozilla thunderbird and Seamonkey mail for easier spell checking in bilingual text.If you need better spelling results try the respective stand-alone...
Direction control and BiDi-related charset misdetection correction
Collections are groups of related add-ons that anyone can create and share.Explore Collections