# Supported capabilities, browsers, and platforms in Device Farm desktop browser testing
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This topic lists the supported configurations of browsers and operating systems. An exception is raised if you request a browser and operating system combination that is not supported.

Values here are suitable for parametrized test suites.

## Supported browsers
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The following browsers are supported:


| Name | `browserName` value | Supported platforms | 
| --- | --- | --- | 
| Google Chrome | chrome | windows | 
| Mozilla Firefox | firefox | windows | 
| Microsoft Edge (Chromium) | MicrosoftEdge | windows | 

**Note**  
AWS Device Farm no longer supports Microsoft Internet Explorer because Microsoft has stopped providing security updates and technical support for older versions of Internet Explorer. For more information, see [Microsoft's announcement of IE end of support](http://microsoft.com/en-us/microsoft-365/windows/end-of-ie-support). 

## Supported capabilities
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The desktop browser testing feature does not implement all capabilities outlined in the [W3C WebDriver documentation](https://w3c.github.io/webdriver/#capabilities). Extension capabilities used by Device Farm desktop browser testing are prefixed with `aws:`. The following capabilities are used by the Device Farm WebDriver node:

`browserName` (string, required, no default)  
Name of the browser to use for the session. Must be one of the [supported browsers](#techref-support-browsers). *This value is always lowercase.*

`browserVersion` (string, required)  
Version of the browser to launch; one of `latest`, `latest-1`, `latest-2`  
Device Farm desktop browser testing does not support requesting specific releases of browsers.

`platform` (string, optional, defaults to `windows`)  
Platform (operating system) to use when creating the session. Must be one of the [supported platforms](#techref-support-platforms).

`aws:maxDurationSecs` (integer, optional, defaults to `900`)  
Maximum duration of the session before it is forcibly closed, in seconds. Range: `180` to `2400`.

`aws:idleTimeoutSecs` (integer, optional, defaults to `120`)  
Maximum delay between WebDriver commands before the session is forcibly closed. Range: `30` to `900`

The following are not allowed:

`w3c` (in Chrome)  
Setting this capability to `false` will result in an error.

`binary`  
Setting this capability will result in an error.

`args`  
The following browser command line parameters are not allowed:  
+ `--headless` (Chrome)
+ `-headless` (Firefox)
+ `--user-data-dir`
+ `--no-sandbox` (Chrome and Firefox)

All other capabilities are passed directly to the target browser-specific WebDriver. These arguments are not officially supported by Device Farm. Their use might result in unexpected behavior.

## Supported platforms
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The following platforms are supported:


| Name | `platform` value | 
| --- | --- | 
| Microsoft Windows | windows |