Privacy and Security

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Certificate Patrol

Your browser trusts many certification authorities and intermediate sub-authorities quietly, every time you enter an HTTPS web site. This add-on reveals when certificates are updated, so you can ensure it was a legitimate change.

Rated 4 out of 5 stars (74)
13,843 users

MM3 Proxy Switch

In the Firefox Browser (and other Mozilla programs) you can per default configure only the setting for one internet connection. With this Proxy Switch you can manage different configurations and simply switch over between these.

Rated 4 out of 5 stars (37)
6,481 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)
1,135 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)
1,905 users

Perspectives

Connect securely to https websites by checking certificates with network notaries. See http://www.perspectives-project.org

Rated 4 out of 5 stars (44)
5,559 users

URLFilter No Restart

Block advertisement and access to adult sites

Rated 4 out of 5 stars (13)
5,129 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)
1,033 users

Conspiracy

Shows flag/country of involved Certification Authorities (CAs) for secured pages.

Rated 5 out of 5 stars (3)
503 users

CustomizeGoogle

Note from Mozilla: This add-on has been discontinued. Try Google Minimalist instead.

CustomizeGoogle enhances Google by adding information and removing unwanted information.

Rated 4 out of 5 stars (370)
8,554 users

Show Password On Input

Gives an option to show the master password on input

Rated 4 out of 5 stars (11)
1,068 users

safeSERP

Prevents Google and Yandex from obfuscating and hijacking links in SERP.
Allows to copy/paste *direct* links from Google/Yandex search results instead of redirects.
Yahoo is also supported.

Rated 5 out of 5 stars (2)
89 users

InfoNotary Configurator for Mozilla

Configures Mozilla for work with certificates issued by InfoNotary Plc.

Rated 5 out of 5 stars (2)
9,185 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)
2,948 users

NoRedirect

NoRedirect lets the user take control of HTTP redirects. It can be used to interdict an ISP's DNS search redirection hijacks, preview/screen "shortened" URLs (e.g., TinyURL), stop the annoying redirection of "smart" error pages, etc.

Rated 4 out of 5 stars (49)
11,879 users

CookieSafe - Control cookie permissions

Control cookie permissions.

Rated 4 out of 5 stars (22)
2,019 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)
2,981 users

Unsubscribe from Mailing List

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

Rated 4 out of 5 stars (13)
1,084 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)
899 users

XML Digital Signature Tool

XML Digital Signature Tool is a Firefox add-on for processing Digital Signature in XML documents
(Please read the installation instruction in the "Developer Comments" section before downloading)

Rated 4 out of 5 stars (3)
291 users

FireWebSSO

Secure remote storage of your personnal passwords, bookmarks and notes, crypted by your navigator. Auto-login, auto fill, auto detect authentication forms or HTTP-authentication, Single Sign-On, always synchronized with all your firefox navigators.

Rated 4 out of 5 stars (5)
4 users