Add-ons
Web and Developer Tools
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RequestPolicy Sync
Stylish Sync
Copy Pure Text
Requires Restart
Allows to copy selected text as plain text by adding a 'Copy as Text' menu item to context menu.
Element Inspector
In the DOM Inspector,quickly navigate to the any elements
foxmeter
Requires Restart
An HTTP analyzer addon for Firefox, fork from HttpFox with features like: summary by host, and more coming soon
bbeContainer
Requires Restart
an extension that allows users to edit local files with browser-based editors.
No More Install Delay
UPDATE: XPI delay has been removed in Firefox 40!
Disable the install delay in Firefox. New 2.0 version now includes GreaseMonkey scripts!
Unlike similar addons, this works on Firefox 4 and beyond.
DOM Inspector Plus! [dm]
Requires Restart
Improved DOM Inspector! [dm version]. Box Model new layout & more data, see screenshot!. Horizontal scroll for Dom-Tree, and some more.
Inspects the structure and properties of a window and its contents.
Restartless Restart
This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.
Proxy Tool
Requires Restart
Proxy Tool - Powerful, yet User-friendly proxy tool to manage your proxies and anonymity needs, including: 46M+ user agents (world's largest), 10 different spoofed HTTP referrers, auto-proxy rotation, plus many more. Developed by http://ProxyList.co
Remote XUL Manager
Manages the Remote XUL whitelist to allow websites and local files to load XUL content. For versions compatible with Firefox 41 and lower, see All Versions page below.
Scriptish
Requires Restart
The greatest user script engine on the Internet (a fork of Greasemonkey).
SeaMonkey Debug and QA UI
Requires Restart
Provides Additional Debug and QA UI for SeaMonkey development and testing.
Joomla! Admin
Requires Restart
Joomla! Admin brings ease & convenience to your computer/workstation, by providing you with a ready-to-use menu options that balms your repetitive work :) Now, Go to the Administrator page or Duplicate the current tab to a new tab/window in a jiffy!!
Cookie Importer
Requires Restart
Imports cookies from a textfile.
Reads Netscape standard cookies.txt files as exported by IE and others.
Very useful in combination with the Cookie Exporter add-on.
View Source
Cookie Exporter
Requires Restart
Exports all cookies in IE manner.
Makes a Netscape standard cookies.txt file.
Very useful for WGET --load-cookies option.
IE Tab + (FF 8+, 7, 6, 5, 4, 3.6, 3.5, SeaMonkey)
Requires Restart
IE Tab + is an enhanced version of IE Tab. It supports FF 3.5 or greater, integrates IE Tab with Adblock Plus in the IE Tab engine, and synchronizes cookies between IE and Firefox. You can easily import settings from the original IE Tab into IE Tab +
jQuery
About Add-ons
Requires Restart
Adds an About button to extensions, themes, and languages in the Add-ons list.
To create your own collections, you must have a Mozilla Add-ons account.
