SeamonkeyNo.1

by alpha.omega101

38 Add-ons in this Collection

Adblock Plus by Wladimir Palant, Eyeo

Rated 5 out of 5 stars 6,225 reviews

14,192,845 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).

Stylish - Custom themes for any website by userstyles.org

Rated 4 out of 5 stars 1,104 reviews

371,659 users

Stylish lets you customize any website with custom user styles (themes for websites). Choose from the largest userstyles library to change the color scheme, background, and skin for Google, Facebook, YouTube and many, many more sites.

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,828 reviews

1,727,764 users

The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.

FoxyProxy Standard by Eric H. Jung

Rated 4 out of 5 stars 499 reviews

181,663 users

FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 4 out of 5 stars 2,109 reviews

928,632 users

The first and only download manager/accelerator built inside Firefox!

Web Developer by chrispederick

Rated 4 out of 5 stars 355 reviews

291,494 users

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

Lightning by Mozilla Calendar Project

Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.

EPUBReader by epubreader

Rated 4 out of 5 stars 234 reviews

265,829 users

With EPUBReader you can read ePub files just in Firefox. No additional software needed!

Flagfox by Dave G

Rated 5 out of 5 stars 736 reviews

327,557 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...

Spanish (Spain) Dictionary by tnarik, RickieES

Rated 4 out of 5 stars 118 reviews

244,148 users

Spanish/Spain Dictionary

United States English Spellchecker by jooliaan

Rated 4 out of 5 stars 173 reviews

382,454 users

United States English Spellchecker for Firefox, Thunderbird and SeaMonkey by Kevin Atkinson and Geoff Kuenning.

To enable, right-click in a multi-line text box, select "Languages", then "English (United States)".

ReminderFox by Tom Mutdosch, Daniel Lee

Rated 4 out of 5 stars 513 reviews

49,031 users

ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.

Mozilla Archive Format, with MHT and Faithful Save by Christopher Ottley, Paolo Amadini

Rated 5 out of 5 stars 321 reviews

101,747 users

— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!

WorldIP - Geo Add-on with Security Features by Alrond

Rated 5 out of 5 stars 121 reviews

18,915 users

Professional Geo Add-on with security features and advanced network tools. Anti-phishing. Protection against DNS spoofing and fake sites. All DNS records for domain. The real location of web server, country flag, extended information about datacenter

RequestPolicy by Justin Samuel

Rated 4 out of 5 stars 207 reviews

13,709 users

Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.
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