My Favorite Add-ons

by Martin Schejbal

14 Add-ons in this Collection

Greasemonkey by Anthony Lieuallen

Rated 4 out of 5 stars 1,491 reviews

733,644 users

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

iMacros for Firefox by Ipswitch, Inc.

Rated 4 out of 5 stars 919 reviews

364,659 users

Automate Firefox. Record and replay repetitive tasks. If you're tired of manually visiting the same sites, filling out forms, downloading files and extracting data, then iMacros is for you! Save time, effort and money with iMacros browser automation!

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,515 reviews

996,833 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...

Web Developer by chrispederick

Rated 4 out of 5 stars 436 reviews

274,539 users

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

Flagfox by Dave G

Rated 5 out of 5 stars 789 reviews

266,419 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...

Full Web Page Screenshots (♥♥♥♥♥) by susbox

FireShot makes full web page screenshots. Demo: http://bit.ly/RlBQMV

Screenshots can be quickly captured and:

― Saved as Image or PDF with links
― Sent to clipboard
― Printed
― Annotated *
― Uploaded *
― E-Mailed *

* OS Windows only

SeoQuake SEO extension by SeoQuake Team

Rated 4 out of 5 stars 237 reviews

31,553 users

Accelerate your SEO efforts on the fly. SEOquake is a free plugin for browsers that provides you with key SEO metrics for a specific page, along with other useful tools such as SEO Audit and many others.

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 199 reviews

77,560 users

View HTTP headers of a page and while browsing.

Download Manager Tweak by squashr1979, andman42

Rated 4 out of 5 stars 401 reviews

26,051 users

Allows the download manager to also open in a tab or sidebar, and adds some optional display changes.

ChatZilla by Gijs Kruitbosch, Robert Ginda, others

Rated 4 out of 5 stars 141 reviews

64,555 users

A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.

Screengrab by Andy M

Rated 4 out of 5 stars 575 reviews

9,606 users

Screengrab! saves webpages as images... but not for new versions of Firefox.

FF changes too fast and I don't have the time to maintain it anymore. Bugs have developed that I am not in a position to investigate.

Therefore, Screengrab is EOL.

SEO Doctor by vprelovac

Rated 4 out of 5 stars 102 reviews

5,198 users

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

Zindus by Leni Mayo

Rated 4 out of 5 stars 199 reviews

14,092 users

Google and Zimbra contact sync for Thunderbird. (TB 24 and above NOT supported)

Gmail Notifier by Doron Rosenberg

Rated 4 out of 5 stars 571 reviews

1,997 users

Note from Mozilla: This add-on has been discontinued. Try WebMail Notifier instead.

The original notifier for Gmail.

What are Collections?

Collections are groups of related add-ons that anyone can create and share.

Explore Collections