Privacy and Security

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Adblock Plus Featured

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Rated 5 out of 5 stars (4,950)
16,655,075 users

Saved Password Editor Requires Restart

Adds the ability to create and edit entries in the password manager.

Rated 5 out of 5 stars (244)
81,913 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)
8,470 users

Password Tags Requires Restart

Adds metadata and sortable tags to the password manager.

Rated 5 out of 5 stars (12)
1,966 users

Mail Merge Requires Restart Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (151)
53,292 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 (53)
5,117 users

Customizations for Adblock Plus

This extension provides various customization options for the Adblock Plus user interface.

Rated 5 out of 5 stars (13)
11,693 users

Native AdBlocker

한국 웹의 광고를 효율적으로 차단합니다.

Rated 5 out of 5 stars (7)
473 users

Bluhell Firewall

Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.

Rated 4 out of 5 stars (326)
89,598 users

Pan

Block ads and manage proxy.

Rated 5 out of 5 stars (77)
4,895 users

Encrypt if possible Requires Restart

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

Rated 5 out of 5 stars (17)
1,680 users

S/MIME Security for Multiple Identities Requires Restart

Adds S/MIME Security configuration to the multiple identities dialog.
Meanwhile this feater has been integrated into Thunderbird 3

Rated 5 out of 5 stars (7)
33 users

TrayHotKey Requires Restart

为Fx5.0 及以上版本提供系统热键(老板键)功能

Rated 4 out of 5 stars (59)
2,620 users

Silent Block

Minimum and fast URL blocker.

Rated 5 out of 5 stars (22)
5,815 users

Confirm-Address Requires Restart

Confirm E-mail address before sending mail

Rated 4 out of 5 stars (39)
47,580 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)
47 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)
2,708 users

Change Referer Button Requires Restart

Button in the toolbar/status bar to change referer value.

Rated 5 out of 5 stars (20)
2,093 users

Auto Address Cleaner Requires Restart

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

Rated 4 out of 5 stars (51)
15,505 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 (11)
414 users