Welcome to Thunderbird Add-ons.
Add extra features and styles to make Thunderbird your own.Close
Recently Updated Extensions
UnMHT No Restart
UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.
Looks up the definition of words on a Web page.
Theme Font & Size Changer No Restart
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
Bluhell Firewall No Restart
Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.
Prevents to save passwords.
Disable about:config feature of Firefox and Thunderbird.
Applies only minor updates of the application.
Dictionary for recipient No Restart
Sets the spell check dictionary based on the first recipient
Provides ability to change status of specific addon (enabled/disabled).
Classic Toolbar Buttons No Restart
'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions on Windows.
Beta builds on versions page!
Send text and images to Microsoft Office OneNote from firefox. With section dialog, we can select an OneNote section to store page with title.
Allows URI texts written in webpages to be loaded by double clicks.
RemindIt No Restart
Help in reminding mails to be answer or sent again. Choose a reminder date for each received or send message that are highlighted in the message list, depending on their status (expired, soon to exprire, to be reminded). Sending a reminder is eased.
Do you remember the old good Eudora statistics? Do you miss them?
Using this addon you can finally keep an eye on how you use your beloved Thunderbird!
Mail Redirect Featured
Allow to redirect (a.k.a. "bounce") mail messages to other recipients.
S3.Google Translator adds the power of Google Translate’s automatic translations to your browser!
It supports translation of selected text, entered phrase or whole webpage between any of 80+ languages.
New Feature: Language learning!
Squared Australis Tabs (Tb) No Restart
A small and simple extension, which replaces the curved tabs of the Australis design with squared ones, similar to Thunderbird v14 and prior.
VCard Addressbook : a new addressbook for Thunderbird based on the VCARD standards