Privacy and Security

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URLFilter No Restart

Block advertisement and access to adult sites

Rated 4 out of 5 stars (13)
5,129 users

Disable clipboard manipulations No Restart

This extension prevents websites from interfering with your copy and paste actions.

Note: The same functionality is now built into Firefox, you can just change the dom.event.clipboardevents.enabled preference manually.

Rated 4 out of 5 stars (24)
4,508 users

Cert Viewer Plus

Certificate viewer enhancements: PEM format view, file export, trust configuration

Rated 5 out of 5 stars (5)
4,508 users

KeePass Helper

Adds a hostname, URL, or email account ID to the application's window name (e.g., that of Firefox or Thunderbird) to make it recognizable to password manager utilities like KeePass.

Rated 4 out of 5 stars (34)
3,961 users

Click-to-Play Manager No Restart

Manages the Click-to-Play domain whitelist.

Rated 5 out of 5 stars (10)
3,763 users

PasswordMaker

One Password To Rule Them All!

Rated 4 out of 5 stars (53)
3,136 users

WebPG for Mozilla

An extension which provides GnuPG/GPG/PGP related functions to Moizilla Firefox, Thunderbird and Seamonkey

Rated 3 out of 5 stars (21)
2,907 users

Controle de Scripts

Controle de Scripts is an extension that allows you to control what JavaScripts do on your browser.

Rated 4 out of 5 stars (27)
2,891 users

Whois & Flags Firefox & Websites Popularity Rating

Display Country Flag indicating Website Physical Location (Country, State, City). Website Popularity (Live Visitor Statistics). Shows how many users are visiting any World Website per day. Website IP IPv6 Addresses, DNS, Hosting. IP Whois Lookup

Rated 4 out of 5 stars (15)
2,884 users

Pan No Restart

Block ads and manage proxy.

Rated 5 out of 5 stars (59)
2,214 users

BullGuard Virus Scan

Scan your computer for malware now! FREE. Simple. Amazingly fast.

Not yet rated
2,159 users

CookieSafe - Control cookie permissions

Control cookie permissions.

Rated 4 out of 5 stars (22)
1,967 users

Trueblock Plus

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)
1,855 users

RequestPolicy Sync No Restart

Sync engine for RequestPolicy.

Rated 5 out of 5 stars (3)
1,528 users

Close Proxy Authentication

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

Rated 5 out of 5 stars (2)
1,219 users

CryptoData

Easily and quickly to encrypt / decrypt
For users: private messages via e-mail, blogs, social networks, forums, etc.
For webmasters: websites, images, photos, etc.
Support: Firefox, Thunderbird and SeaMonkey

Rated 5 out of 5 stars (4)
1,126 users

Show Password On Input

Gives an option to show the master password on input

Rated 4 out of 5 stars (11)
1,108 users

Key Manager

KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation

Rated 3 out of 5 stars (20)
1,077 users

Unsubscribe from Mailing List

Allows recipients to cancel their newsletter subscriptions in the thunderbird interface.

Rated 4 out of 5 stars (13)
1,061 users

Link Status Redux

Shows an indicator on the status bar in front of the link address when the mouse cursor is over a link to a page you have bookmarked or visited before.

Rated 4 out of 5 stars (31)
1,038 users