Extensions by Name

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SendWithoutSubject Requires Restart

Send without subject and without confirmation alert

Rated 3 out of 5 stars (11)
268 users

Sensitive Attachment Guard Requires Restart

A Thunderbird add-on censor sensitive attachments (currently Microsoft Office documents) from being sent to unintended recipients.

Not yet rated
1 user

Sensitivity Header Requires Restart

Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
This allows the user to select Private / Personal / Company-Confidential (or none) for an outgoing message.

Rated 4 out of 5 stars (1)
60 users

Sensitivity Header + SPX Requires Restart

Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
Forked from another add-on developed by ff_bob, added SPX header for Sophos security appliances

Not yet rated
16 users

Sent-By-User column Requires Restart

Adds a new column in message list-view, that will display the name of the user who sent the mail (read from a message header).
Manual configuration required. ONLY FOR THUNDERBIRD.

Rated 5 out of 5 stars (1)
31 users

sepsis-console Requires Restart

A general-purpose JavaScript console for all Mozilla toolkit applications.

Not yet rated
5 users

sepsis-console (Deprecated) Requires Restart

THIS VERSION IS DEPRECATED. Use https://addons.mozilla.org/en-US/developers/addon/sepsis-console instead. See the description below.

sepsis-console is a general-purpose JavaScript console for all Mozilla toolkit applications.

Not yet rated
2 users

Serial Letter Requires Restart

Provides the ability to start writing a template-derived letter directly from within the address book. Supports also multiple recipients. Supports only TeX and similar systems at the moment.

Not yet rated
87 users

Set Default Columns Requires Restart

Provides ability to set default visibility of columns in the thread pane.

Rated 1 out of 5 stars (1)
52 users

setenv

Automatically set environment variables based on preferences.

Not yet rated
4 users

Seturgent Requires Restart

Sets the urgent flag (X11) of the Thunderbird window under Linux in case of new messages. Does ignore special folders like Drafts, Junk and such.

Rated 5 out of 5 stars (2)
55 users

Shedule Filters Requires Restart

Sheduled run message filters

Запуск фильтров сообщений по расписанию

Rated 5 out of 5 stars (1)
94 users

Shift Box Requires Restart

Replay your INBOX!

Not yet rated
47 users

Shift-Delete Controller Requires Restart

Controls shift-delete button behavior. Confirmation dialog is optionally displayed in user defined...

Rated 3 out of 5 stars (9)
201 users

Show Address Requires Restart

Shows the Sender/Recipient Mailaddress in the Mail List. Normaly, only the Name is displayed, which is wrong on most Spam Mails. Now you also can clearly see which of your Mail Addresses was used, extremly usefull if you are using a chatch-all...

Rated 4 out of 5 stars (22)
272 users

Show Address Only Requires Restart

Adds columns to display Sender/Recipients mailaddress only.

Rated 4 out of 5 stars (25)
3,259 users

Show All Body Parts

Enable the View | Message Body As | All Body Parts message display mode.

Rated 5 out of 5 stars (17)
7,428 users

Show Calendar Week Requires Restart

Shows the calendar week Thunderbird/Lightning calendar's moth and multi-week view.

Rated 5 out of 5 stars (6)
2,027 users

Show Fixed-width Temporarily Requires Restart

Show the current plain text message in fixed-width text.

Rated 4 out of 5 stars (3)
278 users

Show InOut Requires Restart

Adds two columns to the list of mails. One shows an indicator wether a mail is incoming or outgoing, the other shows the sender or the recipient of the mail respectively...

Rated 5 out of 5 stars (42)
2,236 users