Replace Ed25519 with hashed API tokens and an in-Firefox client manager.

extension/popup.js

@@ -0,0 +1,16 @@
+"use strict";
+
+const statusEl = document.getElementById("status");
+const manage = document.getElementById("manage");
+
+browser.runtime.sendMessage({ type: "status" }).then((info) => {
+  if (info && info.hostUp) {
+    statusEl.textContent = `Host connected on 127.0.0.1:${info.port}`;
+  } else {
+    statusEl.textContent = "Native host is not connected. Is it installed?";
+  }
+});
+
+manage.addEventListener("click", () => {
+  browser.runtime.openOptionsPage();
+});