/**
 * Adapted directly from content-disposition.js at
 * https://github.com/Rob--W/open-in-browser/blob/master/extension/content-disposition.js
 * which is licensed as:
 *
 * (c) 2017 Rob Wu <rob@robwu.nl> (https://robwu.nl)
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
export declare function getFilename(header: string): string;