by marmg1987

21 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,974 reviews

21,738,930 users

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).

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,791 reviews

2,434,982 users

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 957 reviews

1,299,661 users

Customize the way a web page displays or behaves, by using small bits of JavaScript.

LastPass Password Manager by LastPass, Andrew Zitnay

Rated 4 out of 5 stars 1,237 reviews

777,760 users

LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.

Web Developer by chrispederick

Rated 5 out of 5 stars 217 reviews

600,881 users

The Web Developer extension adds various web developer tools to the browser.

Flagfox by Dave G

Rated 5 out of 5 stars 634 reviews

625,503 users

Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...

Xmarks Sync by Xmarks Inc.

Rated 4 out of 5 stars 2,516 reviews

325,618 users

Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!

FireGestures by Gomita

Rated 4 out of 5 stars 877 reviews

398,277 users

A customizable mouse gestures extension which enables to execute various commands and user scripts with six types of gestures.

AutoProxy by lovelywcm

Rated 4 out of 5 stars 415 reviews

61,541 users

Are you concerned about your privacy? Or, are you blocked from some websites by a firewall? And, are you arming yourself with a proxy? In that case, AutoProxy is designed for you! A tool to help you use your proxy automatically & efficiently.

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 157 reviews

181,651 users

View HTTP headers of a page and while browsing.

HttpFox by Martin Theimer

Rated 4 out of 5 stars 163 reviews

101,974 users

An HTTP analyzer addon for Firefox

SeoQuake SEO extension by SeoQuake Team

Rated 4 out of 5 stars 207 reviews

89,050 users

Seoquake is a Firefox SEO extension aimed primarily at helping web masters who deal with search engine optimization (SEO), social media optimization (SMO) and internet promotion. Seoquake allows to investigate many important SEO parameters.

YSlow by YSlow

Rated 3 out of 5 stars 195 reviews

108,047 users

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. is the official open source website.

SEO Doctor by vprelovac

Rated 4 out of 5 stars 72 reviews

19,142 users

SEO Doctor allows easy SEO diagnosis and problem solving for webmasters.

AddThis by AddThis

Rated 4 out of 5 stars 236 reviews

76,261 users

AddThis for Firefox is the best add-on to make sharing and bookmarking simple. Have all your favorite web 2.0 social networking, bookmarking, blogging, and e-mail services at your fingertips. Share any page, anytime, with anyone.
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