For Firefox 11 Backup. 從 Firefox 11 後整理隨時待命的附加元件，以及可用可不用或較少使用的。
Blocks annoying video ads on YouTube, Facebook ads, banners and much more.
Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
The first and only download manager/accelerator built inside Firefox!
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.
FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.
UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.
Make any pages' search functionality available in the Search Bar (or "search box")...
Monitors web pages for updates. Useful for websites that don't provide Atom or RSS feeds.
Help make Firefox better. The Add-on Compatibility Reporter enables you to report if the Firefox add-ons that you're using are working properly.
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 can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
The Web. Displayed Your Way.
Click to zap away rubbish.
Hack out the noise, read, print in peace.
* Widen Elements & Text.
* Save the changes to Stylish.
* Remove Sidebars & Ads.
* Black on White.
User empowerment (bsd on aardvark)
This extension adds a button ("Dump list") to the Add-ons window. When this button is pressed, a new window is opened with the list of installed extensions, themes or plugins...
Change location of Status Bar Icons, Firefox Menu Button and Menu Bar and more.
Organize your search engines with separators and folders.