SeamonkeyNo.1

by alpha.omega101

38 Add-ons in this Collection

Adblock Plus by Eyeo

Rated 5 out of 5 stars 7,662 reviews

11,785,840 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 2,626 reviews

932,621 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

FoxyProxy Standard by Eric H. Jung

Rated 4 out of 5 stars 616 reviews

166,452 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.

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.

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 4 out of 5 stars 2,865 reviews

608,683 users

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

Stylish - Custom themes for any website by userstyles.org

Rated 4 out of 5 stars 1,314 reviews

316,229 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 491 reviews

257,039 users

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

Flagfox by Dave G

Rated 5 out of 5 stars 887 reviews

236,156 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 157 reviews

244,606 users

Spanish/Spain Dictionary

EPUBReader by epubreader

Rated 4 out of 5 stars 263 reviews

214,130 users

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

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

Rated 5 out of 5 stars 355 reviews

68,651 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 532 reviews

38,220 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 214 reviews

9,132 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.

United States English Spellchecker by jooliaan

Rated 4 out of 5 stars 207 reviews

328,950 users

This dictionary is no longer maintained. Use this dictionary instead.

WorldIP - Geo Add-on with Security Features by Alrond

Rated 5 out of 5 stars 124 reviews

12,184 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
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