Privacy and Security


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 (167)
15,962 users

MDN Extended Requires Restart

Allows the recipient of a message to send a return receipt (MDN: Message Disposition Notification) on message deletion. This addon is usefull for better experience with Notification Viewer addon.

Rated 5 out of 5 stars (1)
3 users

MEGAbird Requires Restart

Add MEGA support to Thunderbird's Filelink feature.

Rated 5 out of 5 stars (11)
2,454 users

Message Level Authentication Requires Restart

Authenticates mail from Message Level Network users, Mail Reputation provided by Sender Score for each message and Anti-Phishing Data from PhishTank. Registration is FREE but not required...

Rated 2 out of 5 stars (13)
0 users

my site 1.0

it allow to browse facebook - youtube and gmail in secured way...

Rated 1 out of 5 stars (1)
1 user

Native AdBlocker

한국 웹의 광고를 효율적으로 차단합니다.

Rated 5 out of 5 stars (9)
153 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

Rated 4 out of 5 stars (30)
4,041 users

Notification Viewer Requires Restart

Identifies and displays the status of pending and received notifications (DSN, MDN) for messages sent with notification requests. To get full experience with this addon, don't forget to use DSN settings and MDN extended addons too.

Rated 4 out of 5 stars (7)
2 users


Block ads and manage proxy.

Rated 5 out of 5 stars (93)
2,710 users

Paranoia Requires Restart

Check if your emails arrived TLS-encrypted (and which corporations were able to read it nevertheless)

Rated 4 out of 5 stars (8)
949 users

pass-manager Requires Restart

Replace integrated password managers storage with zx2c4's pass (

Rated 3 out of 5 stars (1)
12 users

Password Exporter

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

Note: This add-on won't work in Firefox 57. It may eventually if the APIs to access passwords are implemented.

Rated 4 out of 5 stars (530)
156,857 users

Password Tags Requires Restart

Adds metadata and sortable tags to the password manager.

Rated 5 out of 5 stars (13)
1,061 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)
28 users

POW -- Plain Old Webserver Requires Restart

Turn the web on its head with the Plain Old Webserver (POW), which adds a server to your browser.

Rated 5 out of 5 stars (16)
17 users


Automatically apply settings recommended by security and privacy experts.

Rated 3 out of 5 stars (3)
361 users

Purge Events Requires Restart

Purge events from Sunbird and Lightning calendars

Rated 2 out of 5 stars (7)
96 users

QuickPasswords Requires Restart

Retrieve your Passwords the quick way! Never retype or display your secure passwords on screen anymore - put the password where you need it - the login form or the clipboard.

Now also includes SSO change (multi-domain pw) and Backup + Restore.

Rated 5 out of 5 stars (50)
3,536 users

ReloadPAC Requires Restart

Workaround for Bug 351163 (Thunderbird bypasses proxy.pac for first connection).

Not yet rated
7 users

Remote Content By Folder

Decide whether to allow or block remote content in messages by comparing the names of the folders in which they are located to configured regular expressions.

Rated 5 out of 5 stars (1)
34 users