diff --git a/theseus/index.js b/theseus/index.js
index 16af122..4fa090c 100644
--- a/theseus/index.js
+++ b/theseus/index.js
@@ -131,6 +131,12 @@ module.exports = {
     // Theseus asks the user before restarting. Older Theseus builds lack
     // these hooks; the panel then points to Settings > Extensions.
     api.onMessage("update", async ({ step = "stage" } = {}) => {
+      // In place, no restart (Theseus 0.3.77+): Theseus swaps the new version in,
+      // restarts the add-on and reloads this panel.
+      if (step === "apply-now") {
+        if (typeof api.applySelfUpdate !== "function") return { ok: false, reason: "needs a restart" };
+        return await api.applySelfUpdate();
+      }
       if (step === "apply") {
         if (typeof api.restartApp !== "function") return { fallback: "settings" };
         return await api.restartApp();
@@ -138,7 +144,7 @@ module.exports = {
       if (typeof api.checkAndStageSelfUpdate !== "function") return { fallback: "settings" };
       const r = await api.checkAndStageSelfUpdate();
       const staged = r?.status === "staged" || r?.status === "already-staged";
-      return { staged, status: r?.status || "unknown", detail: r?.detail || null, current: r?.current || null, next: r?.next || null };
+      return { staged, status: r?.status || "unknown", detail: r?.detail || null, current: r?.current || null, next: r?.next || null, inPlace: typeof api.applySelfUpdate === "function" };
     });
     api.onMessage("open-settings", ({ section = "" } = {}) => { api.openSettings?.(String(section)); return { ok: true }; });
 
diff --git a/ui/app.js b/ui/app.js
index 55f37f3..26305c3 100644
--- a/ui/app.js
+++ b/ui/app.js
@@ -2482,6 +2482,12 @@ function setupFooter() {
         return r?.status === 'up-to-date' ? flash('✓ Up to date', 'ok', '') : flash('⚠ Update failed', 'err', r?.detail || r?.status || '');
       }
       const next = r.next ? ` v${r.next}` : '';
+      // Newer Theseus applies it in place: the panel reloads on the new version.
+      if (r.inPlace) {
+        showChip(`Updating to${next}…`, 'wait', 'Pithos reloads on the new version in a moment', null);
+        const a = await bridge.invoke('update', { step: 'apply-now' }).catch(() => null);
+        if (a?.ok) return;
+      }
       showChip(`↻ Restart to apply${next}`, '', `Pithos${next} is ready. Theseus restarts to apply it and reopens your tabs.`, async () => {
         try {
           const a = await bridge.invoke('update', { step: 'apply' });