Up & Coming Extensions

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Extra Format Buttons

Adds a font size (in pixels), strikethough, subscript and superscript buttons to Thunderbird's Compose Window.

Rated 5 out of 5 stars (4)
2,485 users

Fire Shabelet

Fire Shabelet is a Japanese Voice Reader Software for Mozilla powered by VDS.

Rated 5 out of 5 stars (1)
1,230 users

Secure Addressing

This add-on provides features to avoid sending emails to wrong addresses. Key features are a confirmation window of recipient's addresses upon sending, name and affiliation look up at mail composition and main windows, and safe auto completion.

Rated 5 out of 5 stars (10)
1,362 users

Just Restart!

Restart application with Ctrl+Shift+Z.

Rated 5 out of 5 stars (3)
1,356 users

ownCloud for Filelink

Add ownCloud support to Thunderbird's filelink feature.

Rated 5 out of 5 stars (4)
1,468 users

DontPhishMe

DontPhishMe is an Anti-Phishing addon for Mozilla Firefox which utilizes the pattern matching techniques to provide the Malaysian Internet user with information and notification to protect them against online banking phishing website.

Rated 5 out of 5 stars (1)
1,277 users

Lightning Featured

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.

Rated 3 out of 5 stars (1,843)
1,439,073 users

GPO support For Firefox and Thunderbird No Restart

Firefox and Thunderbird extension to manage user preferences and user profile CA certificates using GPOs

Rated 4 out of 5 stars (4)
3,994 users

Multi-LDAP

Permits to use several LDAP directories simultaneously for address autocompletion.

Rated 4 out of 5 stars (15)
1,274 users

P7MON

Abilita la gestione alternativa degli allegati P7M

Not yet rated
1,247 users

Tag Sequence Arranger

Enable you to arrange the tag sequences in their listbox.

Rated 5 out of 5 stars (3)
1,515 users

Address bulk copy (アドレス一括コピー)

Thunderbird は Outlook のようにアドレス全選択からの「一括コピー」ができません。
それを実現するためのアドオンです。

Rated 5 out of 5 stars (2)
1,271 users

Color Text Compose Buttons

Adds Text Color Buttons in Compose Toolbar and More: Pixel FontSize, Strikethough, Sub & Superscript, Lower & UpperCase. Also provide Tools: Insert iframe, Launch MathType, Maths & Greek Symbols, Load Template Variables and Duplicate Compose Window.

Rated 5 out of 5 stars (15)
1,896 users

Confirm-Address

Confirm E-mail address before sending mail

Rated 4 out of 5 stars (26)
47,515 users

Join-NG

Join partial messages. Somewhat similar to MS Outlook Express "combine and decode".

Rated 5 out of 5 stars (2)
1,814 users

Check Domain

This extension is to display the warning dialog when you send mail for multiple domains.

Rated 4 out of 5 stars (4)
2,039 users

ThreadVis

Displays a small graphic visualising the context (thread) of the currently selected email.

Rated 4 out of 5 stars (106)
11,677 users

Check and Send

Check the message contents and addresses before you send the message...

Rated 4 out of 5 stars (24)
25,644 users

confirm-mail

メール送信前に宛先メールアドレスと添付ファイル名を確認することができるアドオンです。

Rated 3 out of 5 stars (5)
3,045 users

Menu Wizard

Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey

Rated 5 out of 5 stars (101)
16,414 users