Wie ihr bestimmt wisst, bietet Firefox ^[1] die Möglichkeit Zusatzmodule - so genannte Extensions zu installieren.
Inzwischen gibt es bereits über 800 von diesen Firefox Extensions ^[2] - manche super praktisch, andere total sinnlos

Hier mal die Liste meiner installierten Firefox Extensions inkl. Originalbeschreibungen:

My Firefox Extensions

DOM Inspector 1.8
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 hierarchy can be navigated using a two-paned window that allows for a variety of different views on the document and all nodes within.
visit Dom Inspector ^[3]

Dictionary Search
Dictionary Search provides a very easy way to lookup (or translate) a word in a Web page or an email in an online dictionary such as thefreedictionary.com. Simply select the word you want to lookup. Then right click and select "Dictionary Search for ...". A new tab or browser window will open with the meaning of the word you selected. It works for both for Mozilla Firefox and Mozilla Thunderbird
visit Dictionary Search ^[4]

Foxy Tunes 1.1.5.3
FoxyTunes allows you to control your favorite media player without leaving the browser. The controls are positioned on the status bar or one of the toolbars, so no extra space is wasted. FoxyTunes has several nice features. You can control the playback, adjust the volume, see what's playing and more.
visit Foxy Tunes ^[5]

WebDeveloper 0.9.4
The Web Developer extension adds a menu and a toolbar to the browser with various web developer tools.
visit WebDeveloper 0.9.4 ^[6]

Look Ahead 1.4.1
The Lookahead extension for the Firefox browser was created to provide for efficient usage of time while a user performs Internet searches. The idea is fairly simple and little code is required. After the user chooses the LookAhead mode for web searches in the search toolbar, subsequent searches use the Google or Yahoo! Web Service to query for URLs matching the search and these URLs are loaded into multiple tabs in the browser (the default is to open 5 tabs but is configurable). The user can then quickly scan the returned resources for the desired information and close those windows providing nothing of value.
visit Look Ahead ^[7]

Aardvark 1.0
The Aardvark Firefox extension is a tool for web developers/designers as well as casual users.
visit Aardvark ^[8]

GooglePreview 1.2
A Mozilla Firefox browser extension that inserts preview images (thumbnails) of web sites, Amazon products and stock charts into the Google and Yahoo search results pages. Thumbnails are provided by thumbshots.org and alexa.com.
visit GooglePreview ^[9]

Tab Sidebar 1.0b2
Have you seen the Tab Preview extension? It's good, but I didn't like having to hover over the tab just to see what's in it.Have you used Adobe Acrobat with its smart display of page previews in a sidebar?
This extension sort of combines the two. You get a sidebar that displays a list of your tabs, each showing a thumbnail view along with the tab title, url and buttons to close or reload the tab.
visit Tab Sidebar ^[10]

Mouse Gestures & All-in-One Gestures
Mouse Gestures are a fast way to execute commands without using the keyboard, menus or toolbars. Instead, the user holds down a mouse button (usually the right one), moves the mouse in a certain way to form a gesture, then releases the mouse button. All-in One Gestures allows you to execute common commands using Mouse Gestures!
visit Mouse Gestures ^[11]
visit All-in-One Gestures ^[12]

Meine allerliebsten & ständig benutzten Extensions sind:
- Foxy Tunes
- Mouse Gestures
- Web Developer