/* 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/. */ /** * Optimization for tabs that are restored lazily. We can save a good amount of * memory that to-be-restored tabs would otherwise consume simply by setting * their browsers to 'display: none' as that will prevent them from having to * create a presentation and the like. */ browser[pending] { display: none; }