Profile Management

/**
 * Represents a Firefox user profile for customization.
 * Manages preferences, extensions, certificates, and user data.
 */
public class FirefoxProfile {
    
    /**
     * Creates a new Firefox profile with default settings.
     */
    public FirefoxProfile();
    
    /**
     * Creates a Firefox profile from an existing profile directory.
     * @param profileDir Existing Firefox profile directory
     */
    public FirefoxProfile(File profileDir);
}

import org.openqa.selenium.firefox.FirefoxProfile;
import java.io.File;

// Create new profile
FirefoxProfile profile = new FirefoxProfile();

// Load existing profile
File existingProfile = new File("/path/to/firefox/profile");
FirefoxProfile profile = new FirefoxProfile(existingProfile);

/**
 * Creates a FirefoxProfile from JSON string representation.
 * @param json JSON string containing profile configuration
 * @return FirefoxProfile instance created from JSON
 */
public static FirefoxProfile fromJson(String json);

/**
 * Gets a string preference value.
 * @param key Preference name
 * @param defaultValue Default value if preference not set
 * @return String preference value or default
 */
public String getStringPreference(String key, String defaultValue);

/**
 * Gets an integer preference value.
 * @param key Preference name  
 * @param defaultValue Default value if preference not set
 * @return Integer preference value or default
 */
public int getIntegerPreference(String key, int defaultValue);

/**
 * Gets a boolean preference value.
 * @param key Preference name
 * @param defaultValue Default value if preference not set  
 * @return Boolean preference value or default
 */
public boolean getBooleanPreference(String key, boolean defaultValue);

/**
 * Sets a Firefox preference value.
 * @param key Preference name (about:config key)
 * @param value Preference value (String, Integer, Boolean)
 */
public void setPreference(String key, Object value);

FirefoxProfile profile = new FirefoxProfile();

// Set various preference types
profile.setPreference("browser.startup.page", 1);  // Integer
profile.setPreference("browser.startup.homepage", "https://example.com");  // String
profile.setPreference("dom.webnotifications.enabled", false);  // Boolean

// Get preferences with defaults
String homepage = profile.getStringPreference("browser.startup.homepage", "about:blank");
int startupPage = profile.getIntegerPreference("browser.startup.page", 0);
boolean notifications = profile.getBooleanPreference("dom.webnotifications.enabled", true);

/**
 * Checks if the profile contains the WebDriver extension.
 * @return true if WebDriver extension is present
 */
public boolean containsWebDriverExtension();

/**
 * Adds an extension from the classpath.
 * @param loadResourcesUsing Class to use for resource loading
 * @param loadFrom Classpath location of extension
 */
public void addExtension(Class<?> loadResourcesUsing, String loadFrom);

/**
 * Adds an extension from a file.
 * @param extensionToInstall Extension file (.xpi or directory)
 */
public void addExtension(File extensionToInstall);

/**
 * Adds an extension with a specific key.
 * @param key Extension identifier key
 * @param extension Extension implementation
 */
public void addExtension(String key, Extension extension);

FirefoxProfile profile = new FirefoxProfile();

// Add extension from file
File extensionFile = new File("/path/to/extension.xpi");
profile.addExtension(extensionFile);

// Add extension from classpath
profile.addExtension(MyClass.class, "/extensions/my-extension");

// Check for WebDriver extension
if (profile.containsWebDriverExtension()) {
    System.out.println("WebDriver extension is installed");
}

/**
 * Updates user preferences file with current profile settings.
 * @param userPrefs Target user.js or prefs.js file
 */
public void updateUserPrefs(File userPrefs);

/**
 * Deletes extensions cache if it exists in the profile directory.
 * @param profileDir Profile directory to clean
 */
public void deleteExtensionsCacheIfItExists(File profileDir);

/**
 * Cleans the specified profile directory.
 * @param profileDir Profile directory to clean
 */
public void clean(File profileDir);

/**
 * Cleans temporary model files.
 */
public void cleanTemporaryModel();

/**
 * Returns whether the no-focus library should be loaded.
 * @return true if no-focus library should be loaded
 */
public boolean shouldLoadNoFocusLib();

/**
 * Sets whether to always load the no-focus library.
 * @param loadNoFocusLib true to always load no-focus library
 */
public void setAlwaysLoadNoFocusLib(boolean loadNoFocusLib);

/**
 * Sets whether to accept untrusted SSL certificates.
 * @param acceptUntrustedSsl true to accept untrusted certificates
 */
public void setAcceptUntrustedCertificates(boolean acceptUntrustedSsl);

/**
 * Sets whether to assume untrusted certificate issuers are acceptable.
 * @param untrustedIssuer true to assume untrusted issuers are acceptable  
 */
public void setAssumeUntrustedCertificateIssuer(boolean untrustedIssuer);

/**
 * Writes the profile to disk and returns the directory location.
 * Creates a temporary directory if no existing directory is set.
 * @return File representing the profile directory on disk
 */
public File layoutOnDisk();

import org.openqa.selenium.firefox.FirefoxProfile;
import org.openqa.selenium.firefox.FirefoxOptions;
import java.io.File;

// Create and configure a comprehensive Firefox profile
FirefoxProfile profile = new FirefoxProfile();

// Set browser preferences
profile.setPreference("browser.startup.page", 0);
profile.setPreference("browser.startup.homepage", "about:blank");
profile.setPreference("browser.cache.disk.enable", false);
profile.setPreference("browser.cache.memory.enable", false);
profile.setPreference("dom.webnotifications.enabled", false);
profile.setPreference("media.navigator.permission.disabled", true);

// Download preferences
profile.setPreference("browser.download.folderList", 2);
profile.setPreference("browser.download.dir", "/tmp/downloads");
profile.setPreference("browser.helperApps.neverAsk.saveToDisk", 
    "application/pdf,application/zip,text/csv");

// Security preferences  
profile.setAcceptUntrustedCertificates(true);
profile.setAssumeUntrustedCertificateIssuer(false);

// Add extensions
File extensionFile = new File("/path/to/extension.xpi");
profile.addExtension(extensionFile);

// Configure for headless operation
profile.setAlwaysLoadNoFocusLib(true);

// Write profile to disk
File profileDir = profile.layoutOnDisk();
System.out.println("Profile created at: " + profileDir.getAbsolutePath());

// Use with FirefoxOptions
FirefoxOptions options = new FirefoxOptions().setProfile(profile);
WebDriver driver = new FirefoxDriver(options);