These add-ons are so useful that I cannot work for a single day without them and so I would suspect most web developers and QA Engineers.这些加载项，使有用的，我不能工作，为一个单一的天，没有他们，所以我会怀疑大多数Web开发人员和QA工程师。 These plugins / add-ons makes Firefox a formidable web development and testing platform.这些插件/加载项，使Firefox的一项艰巨的Web开发和测试平台。 They are:他们是：

1. 1 。 Selenium IDE硒的IDE - Selenium IDE is an integrated development environment for Selenium tests. -硒的I DE是一个集成开发环境中硒的试验。 It is implemented as a Firefox extension, and allows you to record, edit, and debug tests.这是实施作为一个Firefox扩展，并允许您录制，编辑，和调试的考验。 It is an extremely useful tool for automating functional and regression testing.它是一个非常有用的工具，自动化功能和回归测试。 Read the 5 minute经过5分钟 Guide to Selenium IDE指南硒的IDE for details.详情。

Selenium IDE is disabled by default in Firefox 3 but you can download the updated version from their website which works with Firefox 3.硒的IDE默认情况下禁用在Firefox 3但是您可以下载更新版本，从他们的网站，其中工程与Firefox 3 。

2. 2 。 Firebug萤火虫 - Firebug integrates with Firefox to put a wealth of development tools at your fingertips to edit, debug, and monitor CSS, HTML, and JavaScript live in any web page. -萤火虫整合与F irefox提出了丰富的开发工具，在您的指尖，以编辑，调试和监测的C SS， H TML和J avaScript的生活在任何网页上。 It is a must-have tool for any web developer.这是一个必须具备的工具，任何网站开发。 FireBug is top class web application debugger, the only one you will ever need.萤火虫是一流的Web应用程序的调试器，只有一个你将以往任何时候都需要。

FireBug is disabled by default in Firefox 3 but you can download the updated version from their website which works with Firefox 3.萤火虫是默认情况下禁用在Firefox 3但是您可以下载更新版本，从他们的网站，其中工程与Firefox 3 。

3. 3 。 Live HTTP Headers生活HTTP标头 - It allows you to view and analyze HTTP headers (requests and responses) in real-time with several useful niceties like filtering built-in. -它可以让您的看法和分析H TTP标头（请求和响应）在实时的时间，与几个有用的细节一样，过滤内建在。 This is a small but extremely useful too to debug web applications.这是一个很小的但非常有用，太调试Web应用程序。 It gives a clear insight into AJAX requests and responses which often goes on behind the scenes in any modern Web 2.0 website.它给人一个清晰的了解Ajax的要求和反应，这往往就在幕后，在任何现代的Web 2.0网站。

4. 4 。 MeasureIt measureit - A small Firefox plugin to measure the dimension of any items on a web page in pixels. -一个小的F irefox插件来衡量方面的任何物品在网页上以像素为单位。

MeasureIt is disabled by default in Firefox 3 but you can download the updated version from their website which works with Firefox 3. measureit是默认情况下禁用在Firefox 3但是您可以下载更新版本，从他们的网站，其中工程与Firefox 3 。

5. 5 。 YSlow yslow - YSlow, a Yahoo product, analyzes web pages and tells you why they’re slow based on the rules for high performance web sites. -y slow，雅虎的产品，分析了网页，并告诉你为什么他们正在缓慢的基础上，规则为高性能的网站。 YSlow is a Firefox add-on integrated with the popular Firebug web development tool. yslow是一个Firefox的加载上结合流行的萤火虫的Web开发工具。 YSlow gives you: yslow让您：

  • Performance report card业绩报告卡
  • HTTP/HTML summary的HTTP /的HTML摘要
  • List of components in the page元件清单在网页
  • Tools including JSLint工具，包括jslint

YSlow completes FireBug functionality to make Firefox an unbeatable web development tool. yslow完成萤火虫的功能，使Firefox的一个无与伦比的Web开发工具。

What are your favorite Firefox Add-ons for web development & QA?什么是您最喜爱的Firefox的加载项，为Web开发和质量保证？