Add-ons

by sloprlek

817 Add-ons in this Collection

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, groeg, others

Rated 4 out of 5 stars 385 reviews

230,412 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 by userstyles.org

Rated 4 out of 5 stars 830 reviews

369,864 users

Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Tumblr, and many, many other sites. You can even customize Firefox and other programs themselves.

NetVideoHunter by netvideohunter

Rated 4 out of 5 stars 399 reviews

206,376 users

This add-on is a downloader that lets you easily download videos from sites like Youtube, Facebook, Metacafe, Dailymotion, Break, VKontakte and music for example from SoundCloud, Grooveshark and from many other sites...

YouTube mp3 by Philip

Rated 3 out of 5 stars 267 reviews

337,736 users

Adds a download button to YouTube. By clicking on it you can download the video as a high quality mp3 file.

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 941 reviews

355,491 users

FireFTP is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers.

Check out my new project, FireSSH!

EPUBReader by epubreader

Rated 4 out of 5 stars 212 reviews

314,018 users

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

Web Developer by chrispederick

Rated 5 out of 5 stars 265 reviews

349,532 users

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

Self-Destructing Cookies by Ove

Rated 4 out of 5 stars 569 reviews

194,980 users

Fix the web. Gets rid of a site's cookies and LocalStorage as soon as you close its tabs. Protects against trackers and zombie-cookies. Trustworthy services can be whitelisted.

SQLite Manager by lazierthanthou

Rated 4 out of 5 stars 79 reviews

162,676 users

Manage any SQLite database on your computer.

Flagfox by Dave G

Rated 5 out of 5 stars 665 reviews

383,807 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...

Web of Trust, MyWOT/WOT: Website Reputation Rating by WOT Services

Rated 4 out of 5 stars 1,323 reviews

396,104 users

Instantly know which websites to trust! WOT protects you while you browse, warning you against dangerous sites that host malware, phishing, and more.

Password Exporter by Justin Scott (fligtar), Jorge Villalobos

Rated 4 out of 5 stars 382 reviews

190,279 users

This extension allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

Evernote Web Clipper by Evernote

Rated 2 out of 5 stars 963 reviews

267,907 users

Use the Evernote Web Clipper to save things you see on the web into your Evernote account.

BlockSite by Wips.com s.r.o.

Rated 3 out of 5 stars 543 reviews

184,636 users

BlockSite is an extension, which automagically blocks websites of your choice. Additionally, this extension will disable all hyperlinks to these websites, by just displaying the link text without the clicking functionality.
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