Most Popular Extensions
This extension allows Adobe installers to detect McAfee Security Scan Plus software is installed on your PC.
Image Zoom Requires Restart
Adds zoom and rotation functionality for images...
The legacy Test Pilot program has been replaced, and this add-on is no longer useful. If you're interested in testing new features in Firefox please join the new program at https://testpilot.firefox.com
Status-4-Evar Requires Restart
Status bar widgets and progress indicators for Firefox 4+
MeasureIt Requires Restart
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
Screengrab (fix version) Requires Restart Featured
Screengrab! saves webpages as images.
New features: upload to internet
1) Screen capture web pages.
2) Selected regions.
3) Whole browser windows.
Edit screenshots and save the images to either local file or Google Drive. Annotate screenshots in a very user-friendly interface with different tools. Upload and share!
A very simple tabbed browsing extension that loads your homepage when you open a new tab. If you have multiple homepages, the first is chosen.
Lucifox Requires Restart
Read EPUB e-books and browse OPDS catalogs.
Text Link Requires Restart
Allows URI texts written in webpages to be loaded by double clicks.
Youtube Downloader 4K - Video Downloader Requires Restart
Download from YouTube 4K videos and thousands other video websites.
Grammarly’s free spelling and grammar checker ensures that everything you type is easy to read, effective, and mistake-free. As you type, Grammarly underlines spelling mistakes and grammatical errors and helps you fix them on the fly.
ChatZilla Requires Restart Featured
A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.
Tab Scope Requires Restart Featured
Preview and navigate tab contents through popup.
YouTube ALL HTML5 Featured
Play all videos on youtube without flash in your preferred size using only HTML5.
Download and save videos playing on a website like youtube to your hard disk
DOM Inspector Requires Restart
DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
Modify Headers Requires Restart
Add, modify and filter the HTTP request headers sent to web servers. This addon is particularly useful for Mobile web development, HTTP testing and privacy.
Youtube MP3 Podcaster Requires Restart
Self contained add-on for downloading youtube videos to mp3 for easy listening on podcasting gadgets like a Zune or iPod
Print Edit Requires Restart Featured
Allows editing of web page content while in Print Preview mode, prior to printing or saving as HTML or PDF. Compacts the layout and removes unwanted content such as adverts, sidebars and blank pages. Any element can be formatted, hidden or deleted.