使用虚拟机（例如 Microsoft 的 Windows XP 模式）并安装多个 IE http://tredosoft.com/Multiple_IE。这允许 XP 支持的所有 Internet Explorer 以及其他浏览器（如果您使用的话）都可以安装在 Vista/Windows 7 中。
可以在不同位置和配置文件文件夹中同时安装 Firefox 版本。
Use a VM, like Microsoft's Windows XP mode and install Multiple IEs http://tredosoft.com/Multiple_IE. This allows for all Internet Explorers supported by XP and the others can be installed in Vista/Windows 7 should you use that.
Concurrent installation of Firefox versions in different locations and profile folders works.
We have recently released Browserstack, an online cross browser testing tool in beta.
All browsers are readily available for interactive testing without any need for local setup or Virtual Machines. All Browsers have debugging tools installed and you can test your local server in our remote browsers. There are many more features we provide for easy testing.
I hope our product can make your cross browser testing easier.
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有不同的在线服务。它们都不完美，但您可以尝试一下：
Adobe BrowserLab（编辑： 2013 年 3 月 13 日关闭）浏览器摄像头
浏览器截图
网页截图专业版
Adobe 推荐作为“BrowserLab”的替代品：
浏览器堆栈
Sauce Labs（他们为 BrowserLab 用户提供优惠）
There are different online services. None of them are perfect but you may give a shot:
Adobe BrowserLab(edit: Shutdown on Mar 13, 2013)Browser Cam
Browser Shots
Web Shots Pro
Recommended by Adobe as replacements for "BrowserLab":
Browser Stack
Sauce Labs (They have an offer for BrowserLab users)
我对同一浏览器的不同版本使用虚拟环境
I use virtual environment for different versions of the same browser
使用虚拟机（例如 Microsoft 的 Windows XP 模式）并安装多个 IE http://tredosoft.com/Multiple_IE。这允许 XP 支持的所有 Internet Explorer 以及其他浏览器（如果您使用的话）都可以安装在 Vista/Windows 7 中。
可以在不同位置和配置文件文件夹中同时安装 Firefox 版本。
Use a VM, like Microsoft's Windows XP mode and install Multiple IEs http://tredosoft.com/Multiple_IE. This allows for all Internet Explorers supported by XP and the others can be installed in Vista/Windows 7 should you use that.
Concurrent installation of Firefox versions in different locations and profile folders works.
我们最近发布了 Browserstack，这是一个测试版的在线跨浏览器测试工具。
所有浏览器均可轻松用于交互式测试，无需本地设置或虚拟机。所有浏览器都安装了调试工具，您可以在我们的远程浏览器中测试本地服务器。为了方便测试，我们还提供了更多功能。
希望我们的产品能够让您的跨浏览器测试变得更加轻松。
We have recently released Browserstack, an online cross browser testing tool in beta.
All browsers are readily available for interactive testing without any need for local setup or Virtual Machines. All Browsers have debugging tools installed and you can test your local server in our remote browsers. There are many more features we provide for easy testing.
I hope our product can make your cross browser testing easier.