Privacy and Security

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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)
1,703 users

RefControl

Control what gets sent as the HTTP Referer on a per-site basis.

Rated 4 out of 5 stars (151)
101,641 users

CookieKeeper No Restart

Extended Cookie Manager - Keep only wanted cookies.

Rated 4 out of 5 stars (14)
8,602 users

Silent Block

Minimum and fast URL blocking by regular expressions.

Rated 5 out of 5 stars (15)
5,351 users

Click-to-Play Manager No Restart

Manages the Click-to-Play domain whitelist.

Rated 5 out of 5 stars (8)
3,808 users

Clean Links No Restart

Converts obfuscated or nested links to genuine clean links.

Eg: http://somesite.com/?to=www.example.comhttp://www.example.com/

Rated 5 out of 5 stars (48)
24,736 users

Whois Lookup & Hosting & DNS & Site Flags Firefox

IP Whois Lookup & Website Reviews & Rating. Display country flag indicating website location. Alexa and Norton Antivirus Site Adviser. Supported: GoDaddy, NetworkSolutions, Dotster, 1and1, NameCheap, Register, Yahoo, 123-Reg, FatCow, Enom, FastHosts.

Rated 3 out of 5 stars (7)
4,900 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 5 out of 5 stars (17)
4,204 users

Hash Password Generator

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

Rated 3 out of 5 stars (4)
296 users

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Rated 4 out of 5 stars (1)
26 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 (1)
133 users

OnlyMySites

Allows access only to my sites.

Rated 5 out of 5 stars (1)
46 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)
549 users

Expiry Canary

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

Rated 5 out of 5 stars (4)
161 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 4 out of 5 stars (6)
767 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)
813 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)
9 users

Conspiracy

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

Rated 5 out of 5 stars (2)
713 users

Advanced Dork:

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

Rated 5 out of 5 stars (19)
294 users

Export All Certificates

Adds an option to export all root certificates.

Rated 5 out of 5 stars (1)
469 users