Privacy and Security

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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)
1,224 users

Encrypt if possible

Sets message security option "encrypt message", if valid X509 certificates are found for all recipients.

Rated 5 out of 5 stars (14)
1,759 users

Key Manager

KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation

Rated 3 out of 5 stars (20)
1,248 users

Password Tags

Adds metadata and sortable tags to the password manager.

Rated 5 out of 5 stars (5)
2,801 users

Automatic Export

exports by an intervall or after pressing the button selected calendars in a defined folder in two modes - normal and backup...

On my homepage is the current version.
Here on this site it takes a long time after i publish a new version.

Rated 4 out of 5 stars (44)
3,824 users

Confirm-Address

Confirm E-mail address before sending mail

Rated 4 out of 5 stars (26)
43,910 users

Batch Copy

Batch Copy creates a local copy of your IMAP account, copies all messages and maintains folder structure. Batch Copy can run incrementally to copy only new messages.

Rated 4 out of 5 stars (7)
1,303 users

Check and Send

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

Rated 4 out of 5 stars (24)
23,759 users

Mail Merge Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (134)
46,797 users

StartupMaster No Restart

Asks for the master password at startup (fixes multiple password prompt)

Rated 4 out of 5 stars (208)
15,228 users

HabuL

Reports spam to the SpamCop, the FTC, FDA, SEC, ACMA and/or Knujon.com. It also allows you to put in your own custom addresses to report spam to such as your ISP or corporate abuse address.

Rated 4 out of 5 stars (31)
1,807 users

DL for Thunderbird

Allows to convert large attachments to links automatically without 3rd party providers.

Rated 5 out of 5 stars (3)
1,266 users

Copy Folder

The missing Thunderbird "copy folder" feature! Copy folders or entire POP/IMAP accounts recursively to any location while maintaining folder structure.

Rated 3 out of 5 stars (30)
9,170 users

Allow HTML Temp

This Add-on allows to have HTML temporarily allowed in the currently displayed message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (if this is your default mode).

Rated 4 out of 5 stars (56)
11,045 users

DKIM Verifier

Verifies the DKIM-Signature of an e-mail.

Rated 5 out of 5 stars (9)
2,691 users

InfoNotary Configurator for Mozilla

Configures Mozilla for work with certificates issued by InfoNotary Plc.

Rated 5 out of 5 stars (2)
9,825 users

Identity Chooser

Identity Chooser helps you to always use the correct identity when composing a new email.

Rated 5 out of 5 stars (90)
8,687 users

Too Many Recipients

Contourne la limite du nombre de destinataires/e-mail des serveurs SMTP.
Gets around the limit on the number of recipients/e-mail of SMTP servers.
Evita la limitación de número de destinatarios/e-mail del servidor SMTP.

Rated 4 out of 5 stars (14)
1,486 users

B-Trust Smart Card Certificate

Configures B-Trust security device, imports B-Trust certification chains and warns user that operation is unrecoverable, if he clicks delete certificate option for B-Trust certificate.
Designed by Borica - Bankservice Plc.

Rated 5 out of 5 stars (1)
10,537 users

Correct Identity

Ever sent mail from the wrong email address because you forgot to select the correct identity in the compose window?

Rated 4 out of 5 stars (81)
6,635 users