For projects with Selenium as the driver, Twist by default executes all the scenarios in a single browser instance. The configurations for this setting is present in the applicationContext-suite.xml

However, executing all scenarios through a single browser instance might not be desirable in all cases. Follow the steps below to use a new browser instance in each Scenario.

• Open the applicationContext-suite.xml and applicationContext-scenario.xml file. These file can be accessed by searching using CTRL+SHIFT+R (or CMD+SHIFT+R on mac) or by navigating to the project's source directory in the Package Explorer View.
• Move all the selenium related bean configurations from applicationContext-suite.xml to applicationContext-scenario.xml

  Now, the applicationContext-scenario.xml should look like this:

  <?xml version="1.0" encoding="UTF-8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://www.springframework.org/schema/beans org/springframework/beans/factory/xml/spring-beans-2.5.xsd">
  
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
      <property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE"/>
      <property name="locations">
        <value>classpath:twist.properties</value>
      </property>
    </bean>
  <!--
     The SeleniumRCDriver manages both the Selenium proxy and client
   -->
   <bean id="seleniumDriverFactory" class="com.thoughtworks.twist.driver.selenium.SeleniumRCDriver" init-method="start" destroy-method="stop" lazy-init="true">
       <property name="serverOptions" value="${selenium.server.options}"/>
       <property name="browserLauncher" value="${selenium.browserLauncher}"/>
       <property name="browserURL" value="${selenium.browserURL}"/>
   </bean>
    <!--
     The actual Twist Selenium extension.
   -->
    <bean id="selenium"
      factory-bean="seleniumDriverFactory"
      factory-method="getTwistSelenium"
      lazy-init="true">
      <constructor-arg value="${twist.selenium.enableImplicitWait}" />
      <property name="highlight" value="${twist.selenium.highlight}"/>
     </bean>
  </beans>  
    

• Save file applicationContext-scenario.xml and execute scenarios.