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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)
5 users

Lock The Text Requires Restart

Encrypt your text data in browser before you submit it to a network

Rated 5 out of 5 stars (10)
1 user

CapsKiller Requires Restart

Caps Killer is a protection against newbies using caps in their mails.

Rated 5 out of 5 stars (2)
0 users

Disable about:config Requires Restart

Disable about:config feature of Firefox and Thunderbird.

Rated 1 out of 5 stars (1)
0 users

DSN Settings 2 Requires Restart

Adds user interface settings for Delivery Status Notification (DSN) requests. This addon is useful for settings for Delivery Notification request and better experience with Notification Viewer addon.

Rated 3 out of 5 stars (2)
10 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 (10)
5 users

Clear IMAP Local Cache Requires Restart

Clears IMAP local cache on startup.

Rated 5 out of 5 stars (1)
8 users

Do Not Save Password Requires Restart

Prevents to save passwords.

Rated 5 out of 5 stars (1)
0 users

Trueblock Plus Requires Restart

Trueblock Plus is a fork of the Adblock Plus extension for blocking unwanted advertisements on the web. This fork provides the exact same features as Adblock plus, with the unpopular, unwanted "acceptable ads" (non-)feature turned off by default.

Rated 4 out of 5 stars (45)
12 users

External Email Alert Requires Restart

Alerts user to confirm that it is ok to send an external email.

Rated 3 out of 5 stars (6)
0 users

Channel Guard Requires Restart

Channelguard disables plugins and protocol handlers to ensure maximum security against side-channel attack.

Rated 4 out of 5 stars (2)
1 user

Purge Events Requires Restart

Purge events from Sunbird and Lightning calendars

Rated 2 out of 5 stars (7)
0 users

PennyPost Requires Restart

This extension makes it very easy to generate and attach stamps to outgoing mail. It also automatically detects and verifies stamps on incoming emails. The MBound algorithm requires a 16MB fixed table to work, HashCash is more CPU intense.

Rated 5 out of 5 stars (4)
0 users

Complete master password Requires Restart

The goal is to avoid to have to enter the master password on application startUp.
The extension is not self-sufficient, a script has to extract the master for a secure storage like gnome-keyring, then to transfer it through an environment variable.

Not yet rated
1 user

Thunderbird Pedophile Reporter Requires Restart

This add-on was created to allow anyone that is contacted by a suspected pedophile or suspected predator. This will gather the header information and send it to our servers to be reviewed by an investigator.

Rated 1 out of 5 stars (3)
0 users

X-Spam-Score Column Requires Restart

Adds a column for the X-Spam-Score header.

Rated 5 out of 5 stars (1)
8 users