My Favorite Add-ons

by sloprlek

882 Add-ons in this Collection

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.

Wappalyzer by Elbert Alias

Rated 4 out of 5 stars 98 reviews

84,289 users

Wappalyzer is a browser extension that identifies software on websites.

Image Zoom by Jason Adams

Rated 4 out of 5 stars 334 reviews

180,073 users

Adds zoom and rotation functionality for images...

Private Tab by Infocatcher

Rated 5 out of 5 stars 204 reviews

78,780 users

Adds private tabs.

Advanced Cookie Manager by Jayapal Karakala

Rated 4 out of 5 stars 30 reviews

41,803 users

A must have tool for Web Developers and Testers to Manage and monitor web cookies.

Features List:
Export / Backup
Import / Restore
Monitor cookies

Available in English, French, Spanish, German and Italian languages.

Proxy Selector by Michele Pezza

Rated 4 out of 5 stars 107 reviews

55,961 users

Proxy Selector lets you switch local proxies in Firefox.

QuickNote by Leszek Życzkowski, Jed Brown, others

Rated 5 out of 5 stars 169 reviews

30,206 users

A simple note-taking extension.

YouTube™ Flash-HTML5 by A Ulmer

Rated 5 out of 5 stars 12 reviews

29,778 users

Play YouTube™ Videos in Flash or HTML5 Player

Complete YouTube Saver by cg-addons

Rated 4 out of 5 stars 109 reviews

24,465 users

Download YouTube videos in various formats including 480p/1080p (DASH formats). Convert audio track from videos to MP3 or WAV, or save audio track in native format (Ogg Vorbis, AAC/M4A, MP3). Save YouTube page, video, and comments pages to one folder

Fasterfox Lite by s.r.o.

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Rated 4 out of 5 stars 251 reviews

65,002 users

Fasterfox Lite: Performance and network tweaks for Firefox, without the Enhanced Prefetching. This is a fork from the original "Fasterfox".

Stealthy by Stealthy

Rated 3 out of 5 stars 113 reviews

84,766 users

Does your country/organization block you from facebook, youtube or others?
Is the service you want unavailable in your country?
Stealthy is the solution for you.
Unlike other extensions we do the work of look for fast proxies for you.

YouTube Anywhere Player by Diego Casorran

Rated 5 out of 5 stars 58 reviews

30,532 users

Watch videos anywhere in cinema mode without leaving the website you're on. Online YouTube to MP3 Converter by

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Rated 5 out of 5 stars 36 reviews

44,594 users

With this addon you can convert your YouTube, Dailymotion, Vevo and Clipfish Videos online to MP3 and MP4!
It it free, easy and very fast.

update 13.06.2014:
The addon was fixed to work with YouTube again after their recent changes.

ChatZilla by Gijs Kruitbosch, Robert Ginda, others

Rated 4 out of 5 stars 126 reviews

161,794 users

A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.

Reader by Baris Derin

Rated 5 out of 5 stars 53 reviews

37,753 users

Reader is the ultimate Reader tool for Firefox.
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