docs/api/dotnet/webdriver/OpenQA.Selenium.Firefox.FirefoxOptions.html - external/github.com/SeleniumHQ/selenium - Git at Google

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         <article data-uid="OpenQA.Selenium.Firefox.FirefoxOptions">


   <h1 id="OpenQA_Selenium_Firefox_FirefoxOptions" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions" class="text-break">
 Class FirefoxOptions  <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L48"><i class="bi bi-code-slash"></i></a>
   </h1>

   <div class="facts text-secondary">
     <dl><dt>Namespace</dt><dd><a class="xref" href="OpenQA.html">OpenQA</a>.<a class="xref" href="OpenQA.Selenium.html">Selenium</a>.<a class="xref" href="OpenQA.Selenium.Firefox.html">Firefox</a></dd></dl>
   <dl><dt>Assembly</dt><dd>WebDriver.dll</dd></dl>
   </div>

   <div class="markdown summary"><p>Class to manage options specific to <a class="xref" href="OpenQA.Selenium.Firefox.FirefoxDriver.html">FirefoxDriver</a></p>
 </div>
   <div class="markdown conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public class FirefoxOptions : DriverOptions</code></pre>
   </div>


   <dl class="typelist inheritance">
     <dt>Inheritance</dt>
     <dd>
       <div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object">object</a></div>
       <div><a class="xref" href="OpenQA.Selenium.DriverOptions.html">DriverOptions</a></div>
       <div><span class="xref">FirefoxOptions</span></div>
     </dd>
   </dl>


   <dl class="typelist inheritedMembers">
     <dt>Inherited Members</dt>
     <dd>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_BrowserName">DriverOptions.BrowserName</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_BrowserVersion">DriverOptions.BrowserVersion</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_PlatformName">DriverOptions.PlatformName</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_AcceptInsecureCertificates">DriverOptions.AcceptInsecureCertificates</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_UseWebSocketUrl">DriverOptions.UseWebSocketUrl</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_UnhandledPromptBehavior">DriverOptions.UnhandledPromptBehavior</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_PageLoadStrategy">DriverOptions.PageLoadStrategy</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_Proxy">DriverOptions.Proxy</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_UseStrictFileInteractability">DriverOptions.UseStrictFileInteractability</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_EnableDownloads">DriverOptions.EnableDownloads</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_ScriptTimeout">DriverOptions.ScriptTimeout</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_PageLoadTimeout">DriverOptions.PageLoadTimeout</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_ImplicitWaitTimeout">DriverOptions.ImplicitWaitTimeout</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_AddAdditionalOption_System_String_System_Object_">DriverOptions.AddAdditionalOption(string, object)</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_GetMergeResult_OpenQA_Selenium_DriverOptions_">DriverOptions.GetMergeResult(DriverOptions)</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_SetLoggingPreference_System_String_OpenQA_Selenium_LogLevel_">DriverOptions.SetLoggingPreference(string, LogLevel)</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_ValidateCapabilityName_System_String_">DriverOptions.ValidateCapabilityName(string)</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_AddKnownCapabilityName_System_String_System_String_">DriverOptions.AddKnownCapabilityName(string, string)</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_RemoveKnownCapabilityName_System_String_">DriverOptions.RemoveKnownCapabilityName(string)</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_IsKnownCapabilityName_System_String_">DriverOptions.IsKnownCapabilityName(string)</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_TryGetKnownCapability_System_String_System_String__">DriverOptions.TryGetKnownCapability(string, out string)</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_GetTypeSafeOptionName_System_String_">DriverOptions.GetTypeSafeOptionName(string)</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_GenerateLoggingPreferencesDictionary">DriverOptions.GenerateLoggingPreferencesDictionary()</a>
     </div>
     <div>
       <a class="xref" href="OpenQA.Selenium.DriverOptions.html#OpenQA_Selenium_DriverOptions_GenerateDesiredCapabilities_System_Boolean_">DriverOptions.GenerateDesiredCapabilities(bool)</a>
     </div>
     <div>
       <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object)">object.Equals(object)</a>
     </div>
     <div>
       <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object-system-object)">object.Equals(object, object)</a>
     </div>
     <div>
       <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.gethashcode">object.GetHashCode()</a>
     </div>
     <div>
       <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.gettype">object.GetType()</a>
     </div>
     <div>
       <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.memberwiseclone">object.MemberwiseClone()</a>
     </div>
     <div>
       <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.referenceequals">object.ReferenceEquals(object, object)</a>
     </div>
     <div>
       <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.tostring">object.ToString()</a>
     </div>
   </dd></dl>


   <h2 id="OpenQA_Selenium_Firefox_FirefoxOptions_examples">Examples</h2>
   <pre><code class="lang-csharp">FirefoxOptions options = new FirefoxOptions();</code></pre>
 <p></p>
 <p>For use with FirefoxDriver:</p>
 <p></p>
 <pre><code class="lang-csharp">FirefoxDriver driver = new FirefoxDriver(options);</code></pre>
 <p></p>
 <p>For use with RemoteWebDriver:</p>
 <p></p>
 <pre><code class="lang-csharp">RemoteWebDriver driver = new RemoteWebDriver(new Uri("http://localhost:4444/wd/hub"), options.ToCapabilities());</code></pre>


   <h2 id="OpenQA_Selenium_Firefox_FirefoxOptions_remarks">Remarks</h2>
   <div class="markdown level0 remarks"><p>Used with the marionette executable wires.exe.</p>
 </div>


   <h2 class="section" id="constructors">Constructors
 </h2>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions__ctor_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.#ctor*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions__ctor" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.#ctor">
   FirefoxOptions()
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L71"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Initializes a new instance of the <a class="xref" href="OpenQA.Selenium.Firefox.FirefoxOptions.html">FirefoxOptions</a> class.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public FirefoxOptions()</code></pre>
   </div>


   <h2 class="section" id="properties">Properties
 </h2>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_AndroidOptions_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.AndroidOptions*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_AndroidOptions" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.AndroidOptions">
   AndroidOptions
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L124"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Gets or sets the options for automating Firefox on Android.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public FirefoxAndroidOptions? AndroidOptions { get; set; }</code></pre>
   </div>


   <h4 class="section">Property Value</h4>
   <dl class="parameters">
     <dt><a class="xref" href="OpenQA.Selenium.Firefox.FirefoxAndroidOptions.html">FirefoxAndroidOptions</a></dt>
     <dd></dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_BinaryLocation_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.BinaryLocation*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_BinaryLocation" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.BinaryLocation">
   BinaryLocation
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L99"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Gets or sets the path and file name of the Firefox browser executable.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public override string? BinaryLocation { get; set; }</code></pre>
   </div>


   <h4 class="section">Property Value</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd></dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_BrowserExecutableLocation_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.BrowserExecutableLocation*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_BrowserExecutableLocation" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.BrowserExecutableLocation">
   BrowserExecutableLocation
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L104"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Gets or sets the path and file name of the Firefox browser executable.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">[Obsolete(&quot;Use BinaryLocation property instead of BrowserExecutableLocation. This one will be removed soon.&quot;)]
 public string? BrowserExecutableLocation { get; set; }</code></pre>
   </div>


   <h4 class="section">Property Value</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd></dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_EnableDevToolsProtocol_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.EnableDevToolsProtocol*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_EnableDevToolsProtocol" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.EnableDevToolsProtocol">
   EnableDevToolsProtocol
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L119"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Gets or sets a value indicating whether to enable the DevTools protocol for the launched browser.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public bool EnableDevToolsProtocol { get; set; }</code></pre>
   </div>


   <h4 class="section">Property Value</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></dt>
     <dd></dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_LogLevel_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.LogLevel*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_LogLevel" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.LogLevel">
   LogLevel
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L114"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Gets or sets the logging level of the Firefox driver.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public FirefoxDriverLogLevel LogLevel { get; set; }</code></pre>
   </div>


   <h4 class="section">Property Value</h4>
   <dl class="parameters">
     <dt><a class="xref" href="OpenQA.Selenium.Firefox.FirefoxDriverLogLevel.html">FirefoxDriverLogLevel</a></dt>
     <dd></dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_Profile_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.Profile*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_Profile" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.Profile">
   Profile
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L94"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Gets or sets the <a class="xref" href="OpenQA.Selenium.Firefox.FirefoxProfile.html">FirefoxProfile</a> object to be used with this instance.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public FirefoxProfile? Profile { get; set; }</code></pre>
   </div>


   <h4 class="section">Property Value</h4>
   <dl class="parameters">
     <dt><a class="xref" href="OpenQA.Selenium.Firefox.FirefoxProfile.html">FirefoxProfile</a></dt>
     <dd></dd>
   </dl>


   <h2 class="section" id="methods">Methods
 </h2>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_AddAdditionalFirefoxOption_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.AddAdditionalFirefoxOption*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_AddAdditionalFirefoxOption_System_String_System_Object_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.AddAdditionalFirefoxOption(System.String,System.Object)">
   AddAdditionalFirefoxOption(string, object)
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L254"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Provides a means to add additional capabilities not yet added as type safe options
 for the Firefox driver.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public void AddAdditionalFirefoxOption(string optionName, object optionValue)</code></pre>
   </div>

   <h4 class="section">Parameters</h4>
   <dl class="parameters">
     <dt><code>optionName</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd><p>The name of the capability to add.</p>
 </dd>
     <dt><code>optionValue</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object">object</a></dt>
     <dd><p>The value of the capability to add.</p>
 </dd>
   </dl>


   <h4 class="section" id="OpenQA_Selenium_Firefox_FirefoxOptions_AddAdditionalFirefoxOption_System_String_System_Object__remarks">Remarks</h4>
   <div class="markdown level1 remarks"><p>Calling <a class="xref" href="OpenQA.Selenium.Firefox.FirefoxOptions.html#OpenQA_Selenium_Firefox_FirefoxOptions_AddAdditionalFirefoxOption_System_String_System_Object_">AddAdditionalFirefoxOption(string, object)</a>
 where <code class="paramref">optionName</code> has already been added will overwrite the
 existing value with the new value in <code class="paramref">optionValue</code>.
 Calling this method adds capabilities to the Firefox-specific options object passed to
 geckodriver.exe (property name 'moz:firefoxOptions').</p>
 </div>

   <h4 class="section">Exceptions</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentexception">ArgumentException</a></dt>
     <dd><p>thrown when attempting to add a capability for which there is already a type safe option, or
 when <code class="paramref">optionName</code> is <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null">null</a> or the empty string.</p>
 </dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_AddArgument_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.AddArgument*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_AddArgument_System_String_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.AddArgument(System.String)">
   AddArgument(string)
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L132"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Adds an argument to be used in launching the Firefox browser.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public void AddArgument(string argumentName)</code></pre>
   </div>

   <h4 class="section">Parameters</h4>
   <dl class="parameters">
     <dt><code>argumentName</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd><p>The argument to add.</p>
 </dd>
   </dl>


   <h4 class="section" id="OpenQA_Selenium_Firefox_FirefoxOptions_AddArgument_System_String__remarks">Remarks</h4>
   <div class="markdown level1 remarks"><p>Arguments must be preceded by two dashes (&quot;--&quot;).</p>
 </div>

   <h4 class="section">Exceptions</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentexception">ArgumentException</a></dt>
     <dd><p>If <code class="paramref">argumentName</code> is <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null">null</a> or <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string.empty">Empty</a>.</p>
 </dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_AddArguments_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.AddArguments*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_AddArguments_System_Collections_Generic_IEnumerable_System_String__" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.AddArguments(System.Collections.Generic.IEnumerable{System.String})">
   AddArguments(IEnumerable&lt;string&gt;)
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L158"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Adds a list arguments to be used in launching the Firefox browser.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public void AddArguments(IEnumerable&lt;string&gt; argumentsToAdd)</code></pre>
   </div>

   <h4 class="section">Parameters</h4>
   <dl class="parameters">
     <dt><code>argumentsToAdd</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a>&gt;</dt>
     <dd><p>An array of arguments to add.</p>
 </dd>
   </dl>


   <h4 class="section">Exceptions</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentnullexception">ArgumentNullException</a></dt>
     <dd><p>If <code class="paramref">argumentsToAdd</code> is <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null">null</a>.</p>
 </dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_AddArguments_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.AddArguments*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_AddArguments_System_String___" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.AddArguments(System.String[])">
   AddArguments(params string[])
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L148"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Adds a list arguments to be used in launching the Firefox browser.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public void AddArguments(params string[] argumentsToAdd)</code></pre>
   </div>

   <h4 class="section">Parameters</h4>
   <dl class="parameters">
     <dt><code>argumentsToAdd</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a>[]</dt>
     <dd><p>An array of arguments to add.</p>
 </dd>
   </dl>


   <h4 class="section" id="OpenQA_Selenium_Firefox_FirefoxOptions_AddArguments_System_String____remarks">Remarks</h4>
   <div class="markdown level1 remarks"><p>Each argument must be preceded by two dashes (&quot;--&quot;).</p>
 </div>

   <h4 class="section">Exceptions</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentnullexception">ArgumentNullException</a></dt>
     <dd><p>If <code class="paramref">argumentsToAdd</code> is <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null">null</a>.</p>
 </dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_SetEnvironmentVariable_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetEnvironmentVariable*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_SetEnvironmentVariable_System_String_System_String_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetEnvironmentVariable(System.String,System.String)">
   SetEnvironmentVariable(string, string?)
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L229"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Sets an environment variable to be set in the operating system's environment under which the Firefox browser is launched.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public void SetEnvironmentVariable(string variableName, string? variableValue)</code></pre>
   </div>

   <h4 class="section">Parameters</h4>
   <dl class="parameters">
     <dt><code>variableName</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd><p>The name of the environment variable.</p>
 </dd>
     <dt><code>variableValue</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd><p>The value of the environment variable.</p>
 </dd>
   </dl>


   <h4 class="section">Exceptions</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentexception">ArgumentException</a></dt>
     <dd><p>If <code class="paramref">variableName</code> is <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null">null</a> or <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string.empty">Empty</a>.</p>
 </dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_SetPreference_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetPreference*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_SetPreference_System_String_System_Boolean_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetPreference(System.String,System.Boolean)">
   SetPreference(string, bool)
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L174"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Sets a preference in the profile used by Firefox.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public void SetPreference(string preferenceName, bool preferenceValue)</code></pre>
   </div>

   <h4 class="section">Parameters</h4>
   <dl class="parameters">
     <dt><code>preferenceName</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd><p>Name of the preference to set.</p>
 </dd>
     <dt><code>preferenceValue</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></dt>
     <dd><p>Value of the preference to set.</p>
 </dd>
   </dl>


   <h4 class="section">Exceptions</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentexception">ArgumentException</a></dt>
     <dd><p>If <code class="paramref">preferenceName</code> is <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null">null</a> or <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string.empty">Empty</a>.</p>
 </dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_SetPreference_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetPreference*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_SetPreference_System_String_System_Double_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetPreference(System.String,System.Double)">
   SetPreference(string, double)
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L207"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Sets a preference in the profile used by Firefox.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public void SetPreference(string preferenceName, double preferenceValue)</code></pre>
   </div>

   <h4 class="section">Parameters</h4>
   <dl class="parameters">
     <dt><code>preferenceName</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd><p>Name of the preference to set.</p>
 </dd>
     <dt><code>preferenceValue</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.double">double</a></dt>
     <dd><p>Value of the preference to set.</p>
 </dd>
   </dl>


   <h4 class="section">Exceptions</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentexception">ArgumentException</a></dt>
     <dd><p>If <code class="paramref">preferenceName</code> is <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null">null</a> or <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string.empty">Empty</a>.</p>
 </dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_SetPreference_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetPreference*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_SetPreference_System_String_System_Int32_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetPreference(System.String,System.Int32)">
   SetPreference(string, int)
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L185"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Sets a preference in the profile used by Firefox.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public void SetPreference(string preferenceName, int preferenceValue)</code></pre>
   </div>

   <h4 class="section">Parameters</h4>
   <dl class="parameters">
     <dt><code>preferenceName</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd><p>Name of the preference to set.</p>
 </dd>
     <dt><code>preferenceValue</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></dt>
     <dd><p>Value of the preference to set.</p>
 </dd>
   </dl>


   <h4 class="section">Exceptions</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentexception">ArgumentException</a></dt>
     <dd><p>If <code class="paramref">preferenceName</code> is <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null">null</a> or <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string.empty">Empty</a>.</p>
 </dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_SetPreference_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetPreference*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_SetPreference_System_String_System_Int64_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetPreference(System.String,System.Int64)">
   SetPreference(string, long)
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L196"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Sets a preference in the profile used by Firefox.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public void SetPreference(string preferenceName, long preferenceValue)</code></pre>
   </div>

   <h4 class="section">Parameters</h4>
   <dl class="parameters">
     <dt><code>preferenceName</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd><p>Name of the preference to set.</p>
 </dd>
     <dt><code>preferenceValue</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int64">long</a></dt>
     <dd><p>Value of the preference to set.</p>
 </dd>
   </dl>


   <h4 class="section">Exceptions</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentexception">ArgumentException</a></dt>
     <dd><p>If <code class="paramref">preferenceName</code> is <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null">null</a> or <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string.empty">Empty</a>.</p>
 </dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_SetPreference_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetPreference*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_SetPreference_System_String_System_String_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.SetPreference(System.String,System.String)">
   SetPreference(string, string)
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L218"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Sets a preference in the profile used by Firefox.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public void SetPreference(string preferenceName, string preferenceValue)</code></pre>
   </div>

   <h4 class="section">Parameters</h4>
   <dl class="parameters">
     <dt><code>preferenceName</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd><p>Name of the preference to set.</p>
 </dd>
     <dt><code>preferenceValue</code> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a></dt>
     <dd><p>Value of the preference to set.</p>
 </dd>
   </dl>


   <h4 class="section">Exceptions</h4>
   <dl class="parameters">
     <dt><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentexception">ArgumentException</a></dt>
     <dd><p>If <code class="paramref">preferenceName</code> is <a href="https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null">null</a> or <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string.empty">Empty</a>.</p>
 </dd>
   </dl>


   <a id="OpenQA_Selenium_Firefox_FirefoxOptions_ToCapabilities_" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.ToCapabilities*"></a>

   <h3 id="OpenQA_Selenium_Firefox_FirefoxOptions_ToCapabilities" data-uid="OpenQA.Selenium.Firefox.FirefoxOptions.ToCapabilities">
   ToCapabilities()
   <a class="header-action link-secondary" title="View source" href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L266"><i class="bi bi-code-slash"></i></a>
   </h3>

   <div class="markdown level1 summary"><p>Returns DesiredCapabilities for Firefox with these options included as
 capabilities. This does not copy the options. Further changes will be
 reflected in the returned capabilities.</p>
 </div>
   <div class="markdown level1 conceptual"></div>

   <div class="codewrapper">
     <pre><code class="lang-csharp hljs">public override ICapabilities ToCapabilities()</code></pre>
   </div>


   <h4 class="section">Returns</h4>
   <dl class="parameters">
     <dt><a class="xref" href="OpenQA.Selenium.ICapabilities.html">ICapabilities</a></dt>
     <dd><p>The DesiredCapabilities for Firefox with these options.</p>
 </dd>
   </dl>


 </article>

         <div class="contribution d-print-none">
           <a href="https://github.com/SeleniumHQ/selenium/blob/trunk/dotnet/src/webdriver/Firefox/FirefoxOptions.cs/#L48" class="edit-link">Edit this page</a>
         </div>


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