Up & Coming Extensions

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Nightly Tester Tools Requires Restart

Useful tools for the nightly tester.

Rated 4 out of 5 stars (194)
38,567 users

Address Move Button Requires Restart

Allow you to add a Address Move Button to mail compose window.

Not yet rated
4,056 users

Check Domain Requires Restart

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

Rated 4 out of 5 stars (5)
2,466 users

Address bulk copy (アドレス一括コピー) Requires Restart

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)
2,047 users

Multi-LDAP Requires Restart

Permits to use several LDAP directories simultaneously for address autocompletion.

Rated 4 out of 5 stars (14)
1,120 users

No application/applefile Requires Restart

Prevents storing of the MIME Type "application/applefile".

Rated 5 out of 5 stars (2)
955 users

Custom Address Sidebar Requires Restart

Allow you to help address sidebar more useful.

Rated 4 out of 5 stars (7)
5,102 users

MarkSubfolders New Requires Restart

Mark all read for Subfolders

It's the same like MarkSubfolders but it's compatible with Firefox 4 and later.

Rated 5 out of 5 stars (2)
1,071 users

ALL To CC BCC Requires Restart

送信先アドレスのすべてをTo、CC、BCCに変更するボタンです。
メール作成画面の、件名の下に追加されます。

Rated 4 out of 5 stars (1)
1,098 users

Address Close Button Requires Restart

Adds a Address Close Button to mail compose window.

Rated 5 out of 5 stars (25)
13,656 users

bulkPaste_recipient Requires Restart

May be send an email to have your work routine.
Mail Settings (To / Cc / Bcc / Return / Subject) etc.

This extension is by creating a simple formatting, you can complete the address written in two steps

Rated 4 out of 5 stars (2)
1,202 users

AdNauseam

Fight back against advertising surveillance

Rated 4 out of 5 stars (12)
7,614 users

Confirm-Address Requires Restart

Confirm E-mail address before sending mail

Rated 4 out of 5 stars (33)
50,845 users

confirm-mail Requires Restart

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)
2,603 users

Secure Addressing Requires Restart

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 (19)
2,758 users

Force Addon Status Requires Restart

Provides ability to change status of specific addon (enabled/disabled).

Not yet rated
1,147 users

Join-NG Requires Restart

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

Rated 5 out of 5 stars (4)
2,546 users

Auto Address Cleaner Requires Restart

Removes comment, display name automatically from addresses before sending mail.

Rated 4 out of 5 stars (51)
16,723 users

CALDAV - Search/Subscribe Requires Restart

Add CalDAV search & subscribe feature to Lightning

Rated 2 out of 5 stars (11)
2,353 users

South African English spell checker Requires Restart

The South African English spell checker allows you to use place names, borrowed words, and other expressions that are unique to South Africa.

"No more eina, just a lekker spell checker!"

Rated 5 out of 5 stars (3)
1,764 users