Mass enable all mailboxes for aliases on the current page on simplelogin.io ; use with an addon like Violentmonkey

simplelog.io_mass_enable_mailboxes.user.js

// ==UserScript==
// @name        simplelogin.io mass enable mailboxes
// @namespace   kevinlekiller/simplelogin.io
// @include     https://app.simplelogin.io/*
// @version     1.1
// @description Mass enable all mailboxes for aliases on the current page on simplelogin.io
// @licence     gpl-3.0 https://www.gnu.org/licenses/gpl-3.0.html
// @author      kevinlekiller
// ==/UserScript==
async function mass_enable() {
  let aliases = document.getElementsByClassName('col-12 col-lg-6');
  //console.log(aliases);
  let aliasesTotal = aliases.length | 0;
  for (let i = 0; i < aliasesTotal; i++) {
    // Sleep 250ms to not overload the server.
    await new Promise(r => setTimeout(r, 250));
    // Sets curNode to the "More" button to the bottom right of an alias.
    let curNode = aliases[i].children[0].children[4].children[1].children[0];
    if (!curNode) {
      continue;
    }
    // Clicks the "More" button.
    curNode.click();
    // Sets curNode to the mailbox dropdown button.
    curNode = aliases[i].children[0].children[5].getElementsByClassName('ms-parent mailbox-select');
    // Skip if alias already has all mailboxes enabled.
    if (curNode[0].textContent.match('All selected')) {
      continue;
    }
    // Clicks the mailbox dropdown selection.
    curNode[0].children[0].click();
    // Clicks the "[Select all]" button to enable all the mailboxes.
    aliases[i].children[0].children[5].getElementsByClassName('ms-drop bottom')[0].children[0].children[0].children[0].children[0].click();
    // Clicks the "Update" button to save the change.
    aliases[i].children[0].children[5].getElementsByClassName('save-mailbox btn btn-sm btn-outline-info w-100')[0].click();
  }
}
mass_enable();