SeamonkeyNo.1

by alpha.omega101

38 Add-ons in this Collection

Adblock Plus by Eyeo

Rated 5 out of 5 stars 6,687 reviews

13,572,448 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).

NoScript Security Suite by Giorgio Maone

Rated 4 out of 5 stars 2,523 reviews

1,548,397 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, "Spectre", "Meltdown" and other JavaScript exploits.
Fx52? https://noscript.net/getit

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 4 out of 5 stars 2,508 reviews

796,265 users

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

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.

FoxyProxy Standard by Eric H. Jung

Rated 4 out of 5 stars 543 reviews

178,512 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.

Stylish - Custom themes for any website by userstyles.org

Rated 4 out of 5 stars 1,188 reviews

321,877 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.

Web Developer by chrispederick

Rated 4 out of 5 stars 430 reviews

286,154 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

271,887 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...

EPUBReader by epubreader

Rated 4 out of 5 stars 239 reviews

252,276 users

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

Spanish (Spain) Dictionary by tnarik, RickieES

Rated 4 out of 5 stars 126 reviews

251,913 users

Spanish/Spain Dictionary

United States English Spellchecker by jooliaan

Rated 4 out of 5 stars 186 reviews

374,625 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)".

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

Rated 5 out of 5 stars 340 reviews

90,479 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!

ReminderFox by Tom Mutdosch, Daniel Lee

Rated 4 out of 5 stars 521 reviews

45,721 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.

RequestPolicy by Justin Samuel

Rated 4 out of 5 stars 209 reviews

14,358 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.

WorldIP - Geo Add-on with Security Features by Alrond

Rated 5 out of 5 stars 124 reviews

16,116 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
  1. 1
  2. 2
  3. 3
Results 115 of 38

What are Collections?

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

Explore Collections

More by this User

See all collections by this user