---
title: Setting the Firefox profile with Selenium WebDriver
description: Set and modify the Firefox profile during automated browser tests.
source_url:
  html: https://testingbot.com/support/web-automate/selenium/firefox-profile
  md: https://testingbot.com/support/web-automate/selenium/firefox-profile.md
---

# Firefox Profile

With Selenium WebDriver, it's possible to set a custom [Firefox profile](https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles), which will be used during your automated tests on TestingBot.   
 To change preferences and settings within Firefox, you'll need to instantiate a new `FirefoxProfile` object and update the properties of the profile.

## Change Firefox Profile

In the example below, we'll set the `accept language` to Spanish and change the `user-agent` header.

[Java](https://testingbot.com#) [Python](https://testingbot.com#) [NodeJS](https://testingbot.com#) [Ruby](https://testingbot.com#) [PHP](https://testingbot.com#) [C#](https://testingbot.com#)

```java
FirefoxOptions options = new FirefoxOptions();
FirefoxProfile profile = new FirefoxProfile();
profile.setPreference("general.useragent.override", "Custom-Agent"); // Change user-agent
profile.setPreference("intl.accept_languages", "es"); // Setting accept language to Spanish
options.setProfile(profile);
options.setPlatformName("WIN11");
options.setBrowserVersion("latest");

HashMap<String, Object> tbOptions = new HashMap<>();
tbOptions.put("key", "API_KEY");
tbOptions.put("secret", "API_SECRET");
tbOptions.put("name", "firefox profile example");
options.setCapability("tb:options", tbOptions);

WebDriver driver = new RemoteWebDriver(new URL("https://hub.testingbot.com/wd/hub"), options);
```

```python
from selenium import webdriver
from selenium.webdriver.firefox.options import Options

options = Options()
options.set_preference('general.useragent.override', 'Custom-Agent') # Change user-agent
options.set_preference('intl.accept_languages', 'es') # Setting accept language to Spanish
options.browser_version = 'latest'
options.platform_name = 'WIN11'
options.set_capability('tb:options', {
  'key': 'API_KEY',
  'secret': 'API_SECRET',
  'name': 'firefox profile example'
})

driver = webdriver.Remote(
  command_executor='https://hub.testingbot.com/wd/hub',
  options=options
)
```

```javascript
const { Builder } = require('selenium-webdriver');
const firefox = require('selenium-webdriver/firefox');

async function main() {
  let options = new firefox.Options();
  options.setPreference('general.useragent.override', 'Custom-Agent'); // Change user-agent
  options.setPreference('intl.accept_languages', 'es'); // Setting accept language to Spanish
  options.setBrowserVersion('latest');
  options.setPlatformName('WIN11');
  options.set('tb:options', {
    'key': 'API_KEY',
    'secret': 'API_SECRET',
    'name': 'firefox profile example'
  });

  let driver = await new Builder()
    .usingServer('https://hub.testingbot.com/wd/hub')
    .setFirefoxOptions(options)
    .build();
}
main();
```

```ruby
require 'rubygems'
require 'selenium-webdriver'

profile = Selenium::WebDriver::Firefox::Profile.new
profile['general.useragent.override'] = 'Custom-Agent' # Change user-agent
profile['intl.accept_languages'] = 'es' # Setting accept language to Spanish

options = Selenium::WebDriver::Firefox::Options.new
options.profile = profile
options.browser_version = 'latest'
options.platform_name = 'WIN11'
options.add_option('tb:options', {
  'key' => 'API_KEY',
  'secret' => 'API_SECRET',
  'name' => 'firefox profile example'
})

driver = Selenium::WebDriver.for(:remote,
  url: 'https://hub.testingbot.com/wd/hub',
  options: options)
```

```php
require_once('vendor/autoload.php');
use Facebook\WebDriver\Remote\RemoteWebDriver;
use Facebook\WebDriver\Remote\DesiredCapabilities;
use Facebook\WebDriver\Firefox\FirefoxOptions;
use Facebook\WebDriver\Firefox\FirefoxProfile;

$profile = new FirefoxProfile();
$profile->setPreference('general.useragent.override', 'Custom-Agent'); // Change user-agent
$profile->setPreference('intl.accept_languages', 'es'); // Setting accept language to Spanish

$options = new FirefoxOptions();
$options->setProfile($profile);

$capabilities = DesiredCapabilities::firefox();
$capabilities->setCapability(FirefoxOptions::CAPABILITY, $options);
$capabilities->setCapability('browserVersion', 'latest');
$capabilities->setCapability('platformName', 'WIN11');
$capabilities->setCapability('tb:options', [
  'key' => 'API_KEY',
  'secret' => 'API_SECRET',
  'name' => 'firefox profile example'
]);

$web_driver = RemoteWebDriver::create(
  'https://hub.testingbot.com/wd/hub',
  $capabilities
);
```

```csharp
FirefoxProfile profile = new FirefoxProfile();
profile.SetPreference("general.useragent.override", "Custom-Agent"); // Change user-agent
profile.SetPreference("intl.accept_languages", "es"); // Setting accept language to Spanish

FirefoxOptions options = new FirefoxOptions();
options.Profile = profile;
options.BrowserVersion = "latest";
options.PlatformName = "WIN11";
options.AddAdditionalOption("tb:options", new Dictionary<string, object>
{
    ["key"] = "API_KEY",
    ["secret"] = "API_SECRET",
    ["name"] = "firefox profile example"
});

IWebDriver driver = new RemoteWebDriver(
  new Uri("https://hub.testingbot.com/wd/hub"), options
);
```

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