Privacy and Security

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TheRealURL

Get URL information: expand short URLs, get title and content type information without visiting the site.

UPDATE, AUG 2013: THIS EXTENSION IS NO LONGER SUPPORTED. The source is open - if you wish to take on the development, you're welcome.

Rated 3 out of 5 stars (7)
543 users
Updated February 15, 2012

Soapy

Bypasses DNS-based censorship

NOTE: This was created as a SOPA protest in 2012. This does not work anymore for most sites. Use Tor instead.

Not yet rated
111 users
Updated February 8, 2012

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)
2,617 users
Updated December 26, 2011

Mailsleuth

Mailsleuth is a add-on for Thunderbird that provides you a full email header analysis of any email in your Inbox. This add-on is designed to provide a report on the email headers on any email you choose from your inbox. MAJOR updates for Feb 2013!

Rated 4 out of 5 stars (6)
846 users
Updated December 13, 2011

Proxy Tool

Proxy Tool - Powerful, yet User-friendly proxy tool to manage your proxies and anonymity needs, including: 46M+ user agents (world's largest), 10 different spoofed HTTP referrers, auto-proxy rotation, plus many more. Developed by http://ProxyList.co

Rated 4 out of 5 stars (39)
12,954 users
Updated December 13, 2011

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 (73)
15,154 users
Updated October 14, 2011

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Rated 4 out of 5 stars (1)
15 users
Updated October 13, 2011

SmartWhois Launcher

This extension allows you to launch SmartWhois and perform a Whois query on the current URL. SmartWhois is a useful network information utility that allows you to look up all the available information about an IP address, hostname or domain...

Rated 3 out of 5 stars (6)
599 users
Updated June 30, 2011

Show Password On Input

Gives an option to show the master password on input

Rated 4 out of 5 stars (11)
1,239 users
Updated May 19, 2011

CensureBlock

This addon blocks sites containing pornographic materials.

Rated 3 out of 5 stars (71)
89,720 users
Updated April 18, 2011

Conspiracy

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

Rated 5 out of 5 stars (3)
615 users
Updated April 7, 2011

Export All Certificates

Adds an option to export all root certificates.

Rated 5 out of 5 stars (1)
585 users
Updated March 31, 2011

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 (48)
11,822 users
Updated March 28, 2011

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)
6 users
Updated February 15, 2011

AdRemind.Me

Want to keep your favourite Web sites alive even when you're using Adblock Plus? AdRemind.Me helps you to supporting your favourite Web sites in deactivating periodically Adblock Plus ad filters only on these sites for 20 seconds.

Rated 4 out of 5 stars (3)
2 users
Updated February 11, 2011

IsAdmin

Shows whether the application is running with admin privileges, using an icon in the status bar; useful if logged in as an administrator and you use privilege limitation tools such as DropMyRights, RunAs or Windows Vista/7's User Account Control.

Rated 5 out of 5 stars (10)
942 users
Updated December 31, 2010

PasswordMaker

One Password To Rule Them All!

Rated 4 out of 5 stars (53)
3,744 users
Updated August 23, 2010

Link Status

Shows an icon on the status bar when the mouse cursor is over a link to a page you bookmarked or visited before. In Firefox 3.5 and later, the extension also offers an option to disable the visited link styling to reduce the risk to privacy.

Rated 4 out of 5 stars (35)
217 users
Updated November 13, 2009

Advanced Dork:

Advanced Dork: gives quick access to Google's Advanced Operators directly from the context menu...

Rated 5 out of 5 stars (20)
261 users
Updated August 7, 2009

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 (371)
12,635 users
Updated October 24, 2008