TabLang Firefox extension allows you to keep separate keyboard layout for each tab and automatically changes system input locale when switching between tabs or windows — the feature Firefox lacks in comparison with Internet Explorer.

Firefox Panorama, the cool tab-organizing feature we've loved since its creation, has changed up its shortcut and added some new ones allowing you to switch between tab groups with a hotkey (and without opening the Tab Panorama window).

This is a patch that modifies the Flash Netscape and ActiveX plugins to keep them in fullscreen when focus is lost. It makes it possible to operate another application when watching Flash video in fullscreen on a multi monitor setup. You can still close fullscreen with the usual methods (Escape key, UI elements). The patch is tested with Flash version 10.0 and 10.1 in Opera, Firefox, Chrome and Internet Explorer. It might also work for previous and/or future versions.

Get rid of that clumsy context menu, and search the web using up to 100 stylish Drag & DropZones.

Pixel Perfect is a Firefox/Firebug extension that allows web developers and designers to easily overlay a web composition over top of the developed HTML.

CodeBurner makes valuable reference material for HTML and CSS available right in your browser.
CodeBurner is a suite of tools for web developers, that provides reference material for HTML and CSS, integrated with a range of popular development environments.

Flagfox is an extension that displays a flag icon indicating the current webserver's physical location. Knowing where you're connected to adds an extra layer of awareness to your browsing and can be useful to indicate the native languages and legal jurisdictions that may apply. Additional information can be obtained via a multitude of external lookups and users can add their own custom actions. All actions can be added to the flag icon's context menu and set to icon click or keyboard shortcuts for quick access.

FishEyeTabs is a tiny extension for Mozilla Firefox that makes tab selection easier when many tabs are open. If tabs become too small, their labels are not readable. In Firefox 1.5 scrolling was introduced, which is often distracting, because the user has to switch from clicking tabs to clicking arrows and back. FishEyeTabs is an alternative to scrolling, it makes tabs visible using fisheye-style zooming. It is enough to move the mouse cursor over a tab, and it becomes visible automatically.

CoLT makes it easy to copy either a hyperlink's text or both the link and the link's text (in a format you specify). Two handy context-menu items make this possible, and don't add clutter; the items are only visible when right-clicking a link!

Tabs are presented in most-recently-used order, similar to Alt+Tab on various operating systems. Shift+Ctrl+Tab shows all tabs in a grid.

Mozilla Firefox look really ugly on Windows Vista, but that can change. With Glasser, you can bring Mozilla Firefox one step closer to looking like the browser made for Windows Vista. It does this by extending the glassy frame seen on other Windows like Windows Explorer and Internet Explorer into the navigation bar on Mozilla Firefox. The effect is astonishing. Don’t believe me, see below what Firefox looks like with Glasser and a little customization.

Fission combines address bar and progress bar - Safari style.

TwitterBar is an extension for the Mozilla Firefox Web browser (originally written by Tony Farndon) that allows you to post to Twitter from the Firefox address bar. Just type your tweet in the address bar and click the TwitterBar icon to send it to Twitter. You can also post the URL of the page you're currently reading by clicking the TwitterBar icon in the address bar.

This extension provides advanced features for the auto-complete URL bar component (Awesome Bar) in Firefox.

This add-on will open the File Browser at the right location, using simple filters on the downloaded file. The filters are based on filenames and hosted domain's name. It can also create dated folders.

Adds a small color picker dialog when editing CSS rule in Firebug. The addon scans for values that can be parsed as CSS colors (#abc, rgb(1,2,3), blue, red etc.) and displays them in a drop-down list right below the firebug's CSS editor box. Clicking on the color value in the drop-down brings up a color picker dialog.

This extension brings a new Events panel that lists all of the event handlers on the page grouped by event type. The panel also nicely integrates with other Firebug panels and allows to quickly find out, which HTML element is associated with specific event listener or see the Javascript source code.

Enhances the awesome bar (location bar) by showing the icon of search engines and bookmarks when you enter their keyword. It also changes the icon and tooltip of the go button when a search is being performed.

Ever wanted to know what was behind the link before you clicked? Interclue tells you everything you need to know before you open yet another tab.

3D in your browser! FoxTab brings innovative 3D functionality to your Firefox.