/**
 * Copyright 2015 CANAL+ Group
 *
 * Licensed 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.
 */
/**
 * Returns either :
 * - 'null' when the current browser is not Firefox.
 * - '-1' when it is impossible to get the Firefox version
 * - A number above 0 that is the Firefox version number
 * @returns {number|null}
 */
declare function getFirefoxVersion(): number | null;
export { getFirefoxVersion };
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