code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  
  package org.openqa.selenium.firefox;
  
  import java.nio.file.Path;
  import org.openqa.selenium.Beta;
  
  /**
   * Used by classes to indicate that they can install and uninstall browser extensions on the fly.
   */
  @Beta
  public interface HasExtensions {
  
    /**
     * Installs an extension.
     *
     * @param path absolute path to the extension file that should be installed.
     * @return the unique identifier of the installed extension.
     */
    String installExtension(Path path);
  
    String installExtension(Path path, Boolean temporary);
  
    /**
     * Uninstall the extension by the given identifier. This value can be found in the extension's
     * manifest, and typically ends with "@mozilla.org".
     *
     * @param extensionId The unique extension identifier returned by {{@link
     *     #installExtension(Path)}}
     */
    void uninstallExtension(String extensionId);
  }
  