Automated test with Selenium using netbeans

I am trying to reproduce the facebook page with selenium using NEtbeans java. but I get this error when doing the Test File.

  

OpenPagen caused an ERROR: Can not find firefox binary in PATH. Make   sure firefox is installed. OS appears to be: LinuxBuild info: version:   '3.12.0 ... (246 chars omitted).

Here the code and the dependencies of the pom.xml

import org.junit.Test;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;

public class TransaccioIT {    

@Test
public void OpenPages(){
    WebDriver driver = new FirefoxDriver();
    String url = "http://www.facebook.com/";

    driver.get(url);
}
}

pom.xml

<dependencies>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-java</artifactId>
        <version>3.12.0</version>
    </dependency>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-support</artifactId>
        <version>3.12.0</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12-beta-1</version>
    </dependency>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-firefox-driver</artifactId>
        <version>3.12.0</version>
        <scope>test</scope>
        <type>jar</type>
    </dependency>
</dependencies>
<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
</properties>