Privacy and Security

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MEGAbird Requires Restart

Add MEGA support to Thunderbird's Filelink feature.

Rated 5 out of 5 stars (8)
1,566 users

DKIM Verifier Requires Restart

Verifies the DKIM-Signature of an e-mail.

Rated 4 out of 5 stars (15)
5,184 users

Close Proxy Authentication Requires Restart

Provides transparent proxy authentication on your enterprise network.
Close authentication dialog if login on proxy failed.

Rated 5 out of 5 stars (4)
1,207 users

DL for Thunderbird Requires Restart

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

Rated 5 out of 5 stars (4)
1,854 users

FoxyProxy Basic Requires Restart

FoxyProxy Basic is a simple on/off proxy switcher. More advanced features and configuration options are offered by FoxyProxy Standard.

Rated 4 out of 5 stars (30)
17,186 users

StartupMaster

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

Rated 4 out of 5 stars (244)
21,474 users

Signal Spam Requires Restart

Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).

Rated 3 out of 5 stars (33)
9,243 users

Too Many Recipients Requires Restart

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 (16)
1,530 users

InfoNotary Configurator for Mozilla Requires Restart

Configures Mozilla for work with certificates issued by InfoNotary Plc.

Rated 5 out of 5 stars (2)
3,745 users

Cert Viewer Plus Requires Restart

Certificate viewer enhancements: PEM format view, trust configuration

Rated 4 out of 5 stars (6)
3,628 users

Mail Merge Requires Restart Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (148)
62,099 users

Enigmail Requires Restart Featured

OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.

Rated 4 out of 5 stars (196)
142,776 users

Yet Another Remove It Permanently Requires Restart

Remove elements and block content on Web pages.

Rated 4 out of 5 stars (40)
1,814 users

Copy Folder Requires Restart

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 (45)
12,269 users

GuifiProxy Requires Restart

Simple proxy manager
- Change proxy with two clicks
- Import and export proxies lists
- Manually add, delete and edit proxies
- Automatic authentication on proxies (bypass popup with login and password)
- Proxysel replacement

Rated 4 out of 5 stars (19)
1,492 users

TORPEDO - TOoltip-poweRed Phishing Email DetectiOn Requires Restart

TORPEDO ist ein Tool zum Erkennen von betrügerischen Links (Phishing). Bewegen Sie die Maus über einen Link in einer Email. TORPEDO zeigt Ihnen die tatsächliche Webadresse in einem Tooltip an und hilft Ihnen, diese zu untersuchen.

Rated 4 out of 5 stars (4)
1,108 users

Password Exporter

This extension allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

Rated 4 out of 5 stars (394)
182,444 users

Allow HTML Temp Requires Restart

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 (59)
10,732 users

No Resource URI Leak

Deny resource:// access to Web content: We fill the hole to defend against fingerprinting. Very important to Firefox privacy. A direct workaround for bugzil.la/863246

Rated 4 out of 5 stars (26)
6,935 users

Master Password+ Requires Restart

Various enhancements for build-in "master password" (MP)
-Locks master security device on demand or after specified time
-Prompts for MP on browser startup
-Suppresses all or duplicate MP prompts
-Locks up entire application or individual windows

Rated 4 out of 5 stars (140)
20,444 users