"a Firefox extension that combines identities across various social network/media sites and provides you with a profile about an individual. Simply navigate to the profile page or a blog of an individual you are interested in and on Windows press Alt i or on the Mac press Ctrl i."

has bookmarklet and Firefox extension, plus an API

"interface tweak that allows you to perform nearly any action or search by dragging any page element—a link, email address, image, or page itself—onto a transparent grid you set up. In other words, instead of right clicking an image to save it, you'd simply grab it and drag it onto the "Save Image" box that pops up when you start dragging. Similarly, highlight and drag text to search any of the search bar engines you've set up. Drag & DropZones' context offerings go a bit beyond what Firefox offers, and it's fully customizable in color, size, and transparency. Drag & DropZones is a free download, works wherever Firefox does." via lifehacker

"Allows you to open links in new tabs, serach texts, save images and do more with drag and drop gestures easier." successor to Drag de Go...

lightweight alternative to Drag de Go

Drop files into attachment boxes instead of browsing for them or type in the filename.

lets you generate and use single-use credit cards in order to make PayPal payments at sites you might not want to give your credit card information to

via lifehacker

creates a Prism web application from within Firefox. Users can manually create web applications using "Tools > Convert Website to Application". The extension can also detect embedded web application bundles on web pages and prompt the user to install the

select, tag, title and upload pictures from your computer to an online photo service. Works with Flickr, Tabblo, 23hq, Smugmug, Marela, and Kodak EasyShare Gallery

a GPS add-on for google earth free edition (or higher) that supports NMEA protocol. geepeeyes plots location, trail, speed, heading and speaks the driving directions on a dynamic map view even if google earth is off-line

Firefox extension that allows you to manage your tasks in Gmail (complete, postpone, and edit tasks), add new tasks (and connect them with your emails, contacts, and Google Calendar events), automatically add tasks for starred messages or specific labels

a system for recording, automating, and sharing processes performed in a web browser such as printing photos online, requesting a vacation hold for postal mail, or checking bank account information.

"a web browser plug in that creates a space for comments in the right hand margin beside any web page. Share your comments privately with only friends or colleagues or share them publicly for the world to see"

a Firefox Extension which lets you pick a content element on a website. Then the appropriate Microsummary Generator is built on the fly and installed into Firefox. If you then make a bookmark of the same web page, you will get the option to give it the Li

modify the header detail of messages

Add concepts inspired by GMail to Thunderbird, like archiving mail and powerful message searching across all folders. Supports tag searching with TB2.0.

An integrated calendar application for Thunderbird

This extension allows Sunbird and Lightning to read and write events to a Google Calendar.

a Firefox extension that turns your browser into a mashup platform, by allowing you to extract data from different web sites and mix them together.

Changes the cursor to indicate the target of a link

Select text and it's automaticaly copied to the clipboard. Like Linux or mIrc

a system for capturing, sharing, and automating tasks on the Web. CoScripter scripts contain human-readable instructions for completing Web-based processes, such as changing your mailing address or searching for real estate.

an extension for Mozilla-based Web browsers that disables the autoplay on YouTube videos.

like greasemonkey for css

a Firefox plug-in that assists you when signing in to OpenID sites with your PIP URL.

an extension to your Firefox browser that will keep trying to reach that website in the background while you continue surfing on other websites. When the website is accessible again, Mr Uptime will let you know. You can also use Mr Uptime when a website r

SwitchProxy is a Mozilla tool you can use to organize all your proxies. You can add, edit and remove them from a single master list. When you need to use one, just select it from the list and click apply.

gives the possibility to import and export in vCard and vcf format

analyzes web pages and tells you why they're slow based on the rules for high performance web sites. YSlow is a Firefox add-on integrated with the popular Firebug web development tool.

a Mozilla Firefox browser extension that protects your privacy by silently defending against cache-based tracking techniques. It allows embedded content to be cached, but segments the cache according to the domain of the originating page.

Permanently hide content (including iframes) from web pages using the Context Menu.

Only addressbooks as a whole are exchanged. There is no synchronization of the content.

import and export mozilla address books at startup and exit of Thunderbird. You can first save a mab at a specific location e.g. on a network or the internet (Version 2.0) and then let it be updated every time TB starts up or exits. One mab can be used by

adds ability to redirect one or more mails to one or more recipients. Feature of mail redirecting is also known as bouncing.

Enigmail is an extension to the mail client of Mozilla / Netscape and Mozilla Thunderbird which allows users to access the authentication and encryption features provided by GnuPG

extends the Send Later functionality by bringing up a scheduler for the time when the “Send Later” option is chosen (Ctrl+Shift+Enter is the shortcut). The extension saves the message to draft and monitors the messages in the draft folder, when the ch

displays keyboard shortcuts as you move your cursor over toolbar buttons and other UI widgets.

a Firefox Extension that embeds a wiki in the Sidebar of your browser, which corresponds to the current page you are viewing home: http://www.wikalong.org/

Operator lets you combine pieces of information on Web sites with applications in ways that are useful. For instance, Flickr + Google Maps, Upcoming.org + Google Calendar, Yahoo! Local + your address book, and many more possibilities and...

Koala is a system for recording, automating, and sharing business processes performed in a web browser. Koala lets you make a recording as you perform a procedure, play it back automatically in the future, and share it with your co-workers.

Select text and it's automaticaly copied to the clipboard

lets you download all the links or images contained in a webpage features an advanced accelerator that increases speed up to 400%, it allows you to pause and resume downloads at any time

provides extra protection for Firefox, Flock, Samonkey and others mozilla-based browsers: this free, open source add-on allows JavaScript and Java execution only for trusted domains of your choice

get a color reading from any point in your browser, quickly adjust this color and paste it into another program

monitors the Woot! web site, and keeps you updated with the current item, price, and if it is sold out. During Woot-Offs, it will also let you know what percent of the item is remaining.

an advanced proxy management tool that completely replaces Firefox's proxy configuration

Allows for customization of the folder pane such as rearranging accounts and choosing a startup folder.

adds a toolbar button that allows the easy toggling of viewing all message headers.

add a Pending folder with sub folders "scheduled" and "later". Use the checkbox next to the subject field to schedule send date

find and remove duplicate messages from selected folder and its subfolder

automatically collapses all quotes, and expands them again on a click. Hold down SHIFT while clicking, and all quotes contained in the current one will be collapsed/expanded. Hold down CTRL, and all quotes of the same nesting level will be toggled. Hold d

redirect one or more mails to one or more recipients.

integrates web site based email accounts in to Mozllia Thunderbird, this allows Thunderbird to download and to send emails using the web site.

adds a menu and a toolbar button to switch the user agent of the browser

a Firefox extension, which helps you to save Web pages and manage the collection.

Allows for customization of the Add Bookmark dialog. The bookmarks tree can be automatically opened and elements can be hidden.

a Firefox extension which lets you to add bits of DHTML ("user scripts") to any web page to change its behavior. In much the same way that user CSS lets you take control of a web page's style, user scripts let you easily control any aspect of a web page's

an extension for Mozilla Firefox which adds a Google search toolbar to the browser. This extension is intended to be a lightweight replacement for the Googlebar, and aims to replicate the most common functions available in the official Google Toolbar for

a sidebar control, inspired by Opera's

allows you to execute several commands (lik open link,save link,search selected text) by the direction you drag and drop.