Privacy and Security

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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)
12,652 users

Adblock Plus No Restart 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 (4,858)
21,534,268 users

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 User Account Control.

Rated 5 out of 5 stars (10)
848 users

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)
187 users

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
110 users

Cache Offline Alert Restorer

Restores the alert when a website asks to store data for offline use.

Rated 5 out of 5 stars (1)
98 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)
366 users

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Rated 4 out of 5 stars (1)
12 users

Element Hiding Helper for Pan No Restart

Help you create element hiding rules for Pan to fight the text ads.

Rated 5 out of 5 stars (2)
345 users

OnlyMySites

Allows access only to my sites.

Rated 5 out of 5 stars (1)
69 users

Netlux Adblocker No Restart

Block unwanted ads.

Not yet rated
75 users

Hash Password Generator

Generates different passwords for each website using a choice of multiple algorithms.

Rated 3 out of 5 stars (4)
312 users

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 3 out of 5 stars (7)
817 users

clamdrib LIN

"clamdrib LIN" ist wie der Name schon sagt die Weiterentwicklung des Add-on clamdrib, allerdings nur noch für Linux. Sämtliche E-Mails, Feeds und News werden auf Viren und anderes Ungeziefer geprüft und gemeldet. Gelöscht wird hierbei jedoch nichts!

Not yet rated
104 users

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)
507 users

RedirectCleaner No Restart

RedirectCleaner cleans Redirects from Links

Rated 5 out of 5 stars (2)
994 users

Expiry Canary

An extension to warn about nearly-expired website SSL certificates.

Rated 5 out of 5 stars (4)
187 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)
749 users

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)
528 users

Conspiracy

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

Rated 5 out of 5 stars (3)
596 users