by kromp

57 Add-ons in this Collection

Video DownloadHelper by mig

Rated 4 out of 5 stars 5,864 reviews

5,217,131 users

The easy way to download and convert Web videos from hundreds of YouTube-like sites.

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 5 out of 5 stars 1,626 reviews

1,483,902 users

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

NetVideoHunter by netvideohunter

Rated 4 out of 5 stars 365 reviews

290,760 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...

ImTranslator - Google Translator, Dictionary, TTS by Smart Link Corporation

Rated 4 out of 5 stars 429 reviews

372,128 users

ImTranslator provides translation powered by Google Translate, Microsoft, Babylon for 70+ languages. It includes Translator, Dictionary, Text-to-Speech, Back Translation.
Video Tutorial:

Flagfox by Dave G

Rated 5 out of 5 stars 636 reviews

655,173 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...

Personas Plus by Mozilla

Rated 3 out of 5 stars 956 reviews

402,829 users

Personas are free, easy-to-install "skins" for Firefox. Personas Plus extends that built-in functionality to give you even more control and easier access to new, popular, and your own favorite Personas.

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 935 reviews

634,532 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!

Xmarks Sync by Xmarks Inc.

Rated 4 out of 5 stars 2,527 reviews

342,300 users

Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 306 reviews

339,959 users

Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 341 reviews

179,116 users

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

X-notifier (for Gmail,Hotmail,Yahoo,AOL ...) by Byungwook Kang

Rated 4 out of 5 stars 1,630 reviews

113,995 users

Notifier for gmail, yahoo, hotmail, aol and more webmails.
X-notifier(aka WebMail Notifier) checks your webmail accounts and notifies the number of unread emails...
Supports : gmail, yahoo, hotmail, POP3/IMAP, facebook, twitter and more

YSlow by YSlow

Rated 3 out of 5 stars 200 reviews

114,787 users

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. is the official open source website.

Image Zoom by Jason Adams

Rated 4 out of 5 stars 334 reviews

180,073 users

Adds zoom and rotation functionality for images...

UnPlug by h2g2bob

Rated 4 out of 5 stars 241 reviews

55,205 users

UnPlug is an extension which lets you save video and audio which is embedded on a webpage - it's a video download tool.

WorldIP - Geo Add-on with Security Features by Alrond

Rated 5 out of 5 stars 115 reviews

44,769 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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