25個輔助Web開發人員開發的FireFox插件。
Web Developer
Web Developer的擴展添加各種Web開發工具到瀏覽器中。
Firebug
Firebug可以實時讓你編輯、調試和監測任意頁面的CSS、HTML和JavaScript
FirePHP
是基于Firebug的一個擴展，可以用來在Firebug的console中方便的輸出php的調試信息又不影響php程序的正常運行。FirePHP enables you to log to your Firebug Console using a simple PHP method call. FirePHP is ideally suited for AJAX development where clean JSON or XML responses are required. All data is sent via response headers. This means that the debugging data will not interfere with the content on your page.
FireQuery
FireQuery是Firebug增強版，專門用于jQuery。
FlashFirebug
用于Action Script 3 (AS3)開發。可以在頁面上調試任意AS3 SWF文件。編輯屬性和像你這樣做的檢查內容為HTML。導向錯誤，警告痕跡的延伸。
Firecookie
Firecookie擴展自Firebug能夠在瀏覽器中查看和管理cookies。
Inline Code Finder
Finds HTML elements with inline JavaScript events, inline styling and javascript: links
Pixel Perfect
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.
Page Speed
Page Speed is an open-source project started at Google to help developers optimize their web pages by applying web performance best practices.
YSlow
YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. YSlow is a Firefox add-on integrated with the Firebug web development tool. YSlow grades web page based on one of three predefined ruleset or a user-defined ruleset. It offers suggestions for improving the page’s performance, summarizes the page’s components, displays statistics about the page, and provides tools for performance analysis, including Smush.it? and JSLint.
FireFTP
FireFTP is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers.
GridFox
Draws a grid on top of a website. This is useful for checking designs that are supposed to follow a grid-based layout.
IE NetRenderer
Render the current page with IE NetRenderer.
Total Validator
Perform multiple validations and take screen shots in one go. This 4-in-1 validator works with external, internal, or local web pages using a local copy of the desktop tool.
ColorZilla
Advanced Eyedropper, ColorPicker, Page Zoomer and other colorful goodies.
Screengrab
Screengrab! saves entire webpages as images. Just right-click on the page you want to grab and look in the “Screengrab” menu. It will capture what you can see in the window, the entire page, just a selection, a particular frame… basically it saves webpages as images – either to a file, or to the clipboard.
Greasemonkey
Allows you to customize the way a web page displays or behaves, by using small bits of JavaScript. Hundreds of scripts, for a wide variety of popular sites, are already available.
InspectorWidget
InspectorWidget (IW) adds a toolbar button and context menus for invoking the DOM Inspector (DOMi) for either chrome or content elements.
Font Finder
FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.
ImTranslator
ImTranslator includes Online Translator in 1640 language combinations. Virtual Keyboard for more than 40 languages; Russian Decoder; Interface localization in 11 languages; other multilingual tools.
X-Ray
See the tags on a page without viewing the sourcecode.
FoxyProxy Standard
FoxyProxy is an advanced proxy management tool that completely replaces Firefox’s limited proxying capabilities. It offers more features than SwitchProxy, ProxyButton, QuickProxy, xyzproxy, ProxyTex, TorButton, etc.
Professor X
The Professor X Extension let’s you see inside a page’s head without viewing the sourcecode.
iMacros for Firefox
iMacros was designed to automate the most repetitious tasks on the web. If there’s an activity you have to do repeatedly, just record it in iMacros. The next time you need to do it, the entire macro will run at the click of a button! With iMacros, you can quickly and easily fill out web forms, remember passwords, create a webmail notifier, download information from other sites, scrape the Web (get data from multiple sites), and more.
AutoCopy
選中文本后，這個插件將自動復制到剪切板中。Also pastes on middle click.
webphp 
ajax