browser.storage.local.get("proxyUrl").then(({ proxyUrl }) => { console.log("Saved proxy url is", proxyUrl); document.getElementById("proxy_url").value = proxyUrl; document.getElementById("proxy_url").addEventListener("input", (e) => { const { value } = e.currentTarget; browser.storage.local .set({ proxyUrl: value, }) .then(() => { console.log("New proxy url saved!", value); }); }); });