Privacy & Security


Active Whois plugin for Firefox Requires Restart

Starting Active Whois to get details about any Web site owner and its host server...

Rated 2 out of 5 stars (12)
324 users

Ad blocker Requires Restart

Note from Mozilla: This add-on has been discontinued. Try Updated Ad Blocker instead.

It blocks ads on the web pages you visit.

Rated 4 out of 5 stars (100)
2,842 users

Ad Blockerr

Block unwanted Popups

Not yet rated
407 users

Ad Blocking FiltersetP Requires Restart

This is FiltersetP without the need for the AdBlock extension.

Rated 3 out of 5 stars (6)
1,995 users

Ad Hacker Requires Restart

Ad Hacker shows you which advertisers and publishers are following you around the Internet. Developers can see details about Javascripts, beacons, and other web bugs. Write your own rules for finding bugs in XML, or visit

Rated 4 out of 5 stars (12)
108 users

Ad Killer Requires Restart

An easy-to-use tool to permanently ban specific annoying ads from your web experience. No typing required - just point and click.

Rated 3 out of 5 stars (74)
39,923 users

Ad Limiter

Search spam blocker. Tells you about the company behind each search result. Limits search ads to one ad per page.

New! - now available on Android

Rated 1 out of 5 stars (1)
2,731 users

Ad-Aware Ad Block

Ad-Aware Ad Block improves your browser’s speed and protects your privacy by blocking ads and trackers. It also improves online security by blocking malicious URLs and establishing the most secure connection available.

Rated 4 out of 5 stars (9)
83,454 users


Ad Blocker lets you block all ads, tracking & malware from the web world. It is an effective solution to browse the web without offensive and annoying ads you hate to see.

Rated 4 out of 5 stars (6)
15,462 users

Ad-blocker for Gmail

Hide ads in Gmail, and more cool stuff, simply with CSS.

Rated 4 out of 5 stars (15)
11,340 users

Adaptive Referer Remover Requires Restart

Adaptive Referer Remover is a firefox extension that prevent leaking specified urls by HTTP Referer header. Blocking urls can be specified by regular expressions, like "^" or "^http://localhost&quo...

Rated 3 out of 5 stars (8)
61 users

Adblock Cyceam

Earn extra money while browsing online! Get rid of ads, and optionally tip your favorite sites.

Not yet rated
61 users

Adblock Edge

Adblock Edge is a fork of the Adblock Plus version 2.1.2 extension for blocking advertisements on the web, without sponsored ads whitelist.

**This addon has been discontinued**

Rated 5 out of 5 stars (305)
390,768 users

Adblock Plus 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 (4,888)
20,704,696 users

AdBlocker for Facebook™

Block Ads Seamlessly on

Rated 3 out of 5 stars (12)
36,844 users

AdBlocker for Gmail™

Removes all annoying Ads and Banners from Gmail

Rated 4 out of 5 stars (3)
24,516 users

Adblocker for Vkontakte & Odnoklassniki

Не знаешь как заблокировать рекламу в ВК и Одноклассниках? Установи блокировщик рекламы для социальных сетей!

Not yet rated
1,383 users

AdBlocker for YouTube™ Featured

AdBlocker for YouTube™ removes all annoying Ads from YouTube

Rated 4 out of 5 stars (33)
330,522 users

AdBlocker Lite

block ads seamlessly on popular websites

Rated 4 out of 5 stars (31)
78,712 users

AdBlocker Ultimate

Free and improved ad blocker. Completely remove ALL ads. No "acceptable" ads or whitelisted advertisers, block tracking, block malware!

Rated 5 out of 5 stars (601)
385,346 users