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Joinesty

Joinesty extension, because life is for joining.
The best free password manager

Not yet rated
1 user

JonDoFox+Plus

JonDoFox aims to let all user look the same against third parties (web sites, other observers on the Internet) and to technically prevent tracking.

Not yet rated
338 users

JS Exec Requires Restart

Javascript Executer Toolbar

Rated 5 out of 5 stars (1)
1 user

JS Switch Requires Restart

Add a toolbar button or an option in Tool menu to toggle JavaScript

Rated 4 out of 5 stars (20)
6,605 users

JS Switcher

Turns on and off JavaScript

Rated 2 out of 5 stars (4)
288 users

jsGuardian

A content filter for websites, emulating dansguardian.

It has a number of key words, which it tries to find on the web page. For each word found, a score is incremented. If a certain limit is passed, the page is blocked with a very simple message.

Not yet rated
251 users

JSOff

Disable and enable JavaScript using a simple toolbar button.

Rated 4 out of 5 stars (18)
3,096 users

Just Disable Stuff

Just disable JavaScript - toggle it on and off. No fancy toolbars, icons, windows, unnecessary functions. Just do it. You can also disable images. Just like that.

Rated 4 out of 5 stars (22)
24,631 users

kabotya Requires Restart

proxy(gae and dotcloud)/google link remover

Not yet rated
2 users

Karma Blocker Requires Restart

Block resources based on their karma.

Rated 4 out of 5 stars (88)
4,931 users

Kaspersky Fraud Prevention for Mac

This is the Kaspersky Fraud Prevention Extension

Rated 2 out of 5 stars (1)
84 users

Kaspersky Password Manager for Mac

Stores your logins, passwords, and other important information, protecting them with a master password.

Rated 1 out of 5 stars (2)
702 users

KDAF Requires Restart

KDAF stands for Knowledge-based data access in Facebook.
This extension gives user the ability to distinguish friends on the degree of friendship. You can encrypt private data with private information only your real friends know.

Not yet rated
2 users

KDE Wallet password integration Requires Restart

This is an extension that allows firefox use kde's kwallet password manager to store passwords.

Rated 4 out of 5 stars (135)
1,137 users

KDE5 Wallet password integration Requires Restart

This extension enable passwords and form logins to be stored in KDE5 Wallet

Rated 4 out of 5 stars (33)
1,230 users

KeeFox Requires Restart

Simple and secure password management. Login automatically, never forget another password, stay in control of your passwords and improve their security. Powered by the world-renowned KeePass Password Safe.

Rated 5 out of 5 stars (1,317)
65,243 users

Keep Until Closed

Add-on to assist with the 'keep cookies until closed' lifetime policy.
Adds a single button to allow the current tabs cookie to survive a browser restart.

Not yet rated
33 users

KeePass Helper Requires Restart

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 (36)
5,410 users

KeePassHelper

Helper extension to find and insert logins and passwords without copying them

Rated 5 out of 5 stars (1)
125 users

Keeper® Password Manager & Digital Vault

Keeper protects you against hackers with a secure and convenient password manager. Your passwords, logins, credit card numbers, bank accounts and other personal information is saved in your private digital vault that is encrypted and unbreakable.

Rated 4 out of 5 stars (23)
7,623 users