Mozilla Firefox (category)
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Origins and Lineage
Netscape Communications Corp. Netscape Navigator Netscape Communicator Mozilla Application Suite
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This is a list of some of the many available Firefox extensions, software add-ons designed for Mozilla Firefox based web browsers. Many Firefox extensions work in the SeaMonkey and Flock web browsers as well.

For a more complete list, see the official repository, Mozilla Add-ons. ^[1]

Official

ChatZilla

• ChatZilla - a full-fledged Internet Relay Chat client that works inside Firefox.
• DOM Inspector - for web developers. It allows them to inspect the Document Object Model tree of any page.
• Venkman - a JavaScript debugger for web developers.
• Talkback - reports any crashes of Firefox to Mozilla.

Firefox Companions

These are official Firefox extensions which are also co-developed and distributed by Mozilla on their site as a bundle (extension + browser). The close involvement of Mozilla in these distribution is notable as being a new distribution tactic, especially with large sites like eBay who have a very large distribution reach.

• Firefox Companion for eBay - tracks "my eBay" status and get alerts for certain events such as being outbid.

Google

Advanced Dork: default highlighted text context menu.

• Google Browser Sync - allows users to synchronize their settings across multiple computers via the Internet (no longer under development, will not have a FF3 version of this extension).
• Google Gears - enables offline access to services that normally only are available online, by installing a database engine on the client system to cache the data locally.
• Google Earth Plugin - provides full integration of Google Earth into the browser.
• Google Notebook - provides a simple way to save and organize clips of information when conducting research online.
• Google Toolbar - provides features related to Google Search as a toolbar.
• Google Web Accelerator - a web accelerator.
• Advanced Dork - provides Google's Advanced Operators for use in context menus.
• Googlepedia - shows users Wikipedia articles along with their Google search results.

Applications

• FireFTP - is a cross-platform FTP client which provides access to FTP servers.

Website integration

• ChunkIt! - personal search engine that presents web data as "chunks" of information
• Stylish - redesigns websites on the fly and delivers a custom website (CSS websites only).
• AllPeers - provides file-sharing by peer-to-peer among friends registered to the service.
• Googlepedia - shows users Wikipedia articles along with their Google search results.
• Joga.com Companion - creates a visual theme for Mozilla Firefox as well as providing tools relating to the 2006 FIFA World Cup and Joga.com
• LibX - library catalogues
• StumbleUpon - allows users to encounter random sites based upon the rating given by stumblers and their interests.
• Wikipedia Toolbar - aids in Wikipedia navigation and editing.

Browser features

• Adblock Plus (variant of Adblock) is used for blocking ads via a paired blacklist and whitelist.
• AlchemyPoint - a browser-based mashup / semantic web tool, lets you customize websites, scrape structured data into RSS feeds, etc.
• All-in-One Sidebar - adds enhanced sidebar functionality similar to that found in the Opera web browser.
• Colorful Tabs - adds randomized colors to page tabs in order to beautify the interface.
• Cookiesafe - controls which websites have permission to store cookies.
• DownloadStudio - a popular download manager/accelerator.
• DownThemAll! - a popular download manager/accelerator.
• Fasterfox - pre-fetches links on pages, adjusts page rendering, and employs "network optimizations" to make browsing faster.
• Feedview - opens RSS and Atom feeds as webpages.
• Firefox Showcase - shows tabs as thumbnails, to preview, manage and search across them.
• Flashblock - prevents Flash content from running without being explicitly started (clicked) or whitelisted.
• Greasemonkey - allows users to install user scripts that modify specific web pages.
• IE Tab - allows users to view pages using the Internet Explorer rendering engine from within Firefox. This is useful for some websites that do not work properly in Firefox.
• Image Zoom - allows users to change image sizes within the page.
• iMacros - a macro recorder for the Firefox web browser.
• Me.dium - shows a graphical map of people on the web
• NoScript - allows users to control JavaScript and other potentially executable content.
• Operator - parses microformats.
• Outwit - automatically collects and organizes data from the Web.
• PDF Download - allows users to customize the handling of PDF files.
• Sage - a popular, lightweight Feed reader extension.
• ScrapBook - adds enhanced scrapbooking, page saving, bookmarking, and notetaking functionality.
• Stylish - allows the user to install custom CSS that can modify specific web pages and XUL application interfaces.
• Tab Mix Plus - provides tabbed browsing enhancements.
• VideoDownloader - used to download videos from sites like Youtube or Metacafe.
• Vimperator - makes Firefox feel and behave like the Vim text editor.
• Zotero - enables users to collect, manage, and cite research from all types of sources from the browser

Website development tools

• Firebug - allows the debugging, editing, and modifying of any website's CSS, HTML, DOM, and JavaScript, and provides other web development tools.
• Web Developer - adds a menu and a toolbar to the browser with various web developer tools.

Application integration

• FlashGot - provides download features and integration with a variety of external download managers.
• FoxyTunes - controls external media players.

Compatibility status

Following is the compatibility status of various extensions with different versions of Firefox:

References