Privacy and Security

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Flex Confirm Mail Requires Restart

Confirm mail address and attachments based on flexible rules.

Rated 1 out of 5 stars (1)
13,193 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)
3,658 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)
2,789 users

Confirm-Address Requires Restart

Confirm E-mail address before sending mail

Rated 4 out of 5 stars (41)
62,869 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 (20)
3,540 users

Check and Send Requires Restart

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

Rated 4 out of 5 stars (31)
25,673 users

Auto Address Cleaner Requires Restart

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

Rated 4 out of 5 stars (51)
20,126 users

GProxy Plus Requires Restart

GProxy Plus lets you set and clear Freegate local proxy in Firefox and Thunderbird, and do more.

Not yet rated
6,957 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)
1,541 users

Yet Another Remove It Permanently Requires Restart

Remove elements and block content on Web pages.

Rated 4 out of 5 stars (47)
2,560 users

BorderColors GT Requires Restart

How many time you sent an email from your wrong email address?
This add-ons allows you assign a different color to the compose window border for each of your email addresses. So you can immediately view from what account are you writing.

Rated 4 out of 5 stars (8)
5,011 users

Get before Send Requires Restart

Get messages for the account which is bound to the identity then send the message when you click the toolbar button or the menu item. If your SMTP sever authenticates using POP(IMAP) before SMTP, the extension is useful.

Rated 5 out of 5 stars (2)
1,272 users

DL for Thunderbird Requires Restart

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

Rated 5 out of 5 stars (3)
2,093 users

InfoNotary Configurator for Mozilla Requires Restart

Configures Mozilla for work with certificates issued by InfoNotary Plc.

Rated 5 out of 5 stars (2)
8,699 users

Mail Merge Requires Restart Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (146)
68,320 users

Identity Chooser Requires Restart

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

Rated 5 out of 5 stars (89)
10,138 users

MEGAbird Requires Restart

Add MEGA support to Thunderbird's Filelink feature.

Rated 4 out of 5 stars (6)
1,073 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 (48)
13,377 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 (23)
2,095 users

Batch Copy Requires Restart

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 (9)
1,289 users