function saveOptions(e) { e.preventDefault(); browser.storage.sync.set({ rb: document.querySelector("#rb").value, tr: document.querySelector("#tr").value }); } function restoreOptions() { function setCurrentChoice(result) { document.querySelector("#rb").value = result.rb || ""; document.querySelector("#tr").value = result.tr || ""; } function onError(error) { console.log(`Error: ${error}`); } let getting = browser.storage.sync.get(["rb", "tr"]); getting.then(setCurrentChoice, onError); } document.addEventListener("DOMContentLoaded", restoreOptions); document.querySelector("form").addEventListener("submit", saveOptions);