startup.js

/*
 * Copyright 2019 Oleksandr Bezushko
 * Copyright 2019 tazeat
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
 * and associated documentation files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom
 * the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

function onError(error) {
    console.log(`Error: ${error}`);
}

function updateWindow(window) {
    browser.windows.update(window.id, {state: "fullscreen"});
}

console.log(`AutoFullscreen Running`);
browser.windows.getAll().then((windowInfoArray) => {
    for (const currentWindow of windowInfoArray) {
        updateWindow(currentWindow)
    }
}, onError);

browser.windows.onCreated.addListener((window) => {
    console.log("New window: " + window.id);
    setTimeout(() => updateWindow(window), 50)
});