import './settings.scss'; let form = document.getElementById('vimvixen-settings-form'); form.addEventListener('submit', (e) => { let value = { json: e.target.elements['plain-json'].value }; e.preventDefault(); browser.storage.local.set(value); }); document.addEventListener('DOMContentLoaded', () => { browser.storage.local.get().then((value) => { if (value.json) { form.elements['plain-json'].value = value.json; } }, console.error); });