diff --git a/extensions/index.html b/extensions/index.html
index 85d8cfc..09f90ac 100644
--- a/extensions/index.html
+++ b/extensions/index.html
@@ -96,6 +96,11 @@
   .ext .h b{color:var(--mut);font-weight:600;min-width:70px}
   .ext .h code{font-family:ui-monospace,monospace;font-size:10.5px;color:#c9d4e3;word-break:break-all;background:transparent;border:none;padding:0}
   .ext .meta{color:var(--dim);font-size:12.5px;margin-top:.4rem}
+  .ext .act .download{display:inline-block;padding:9px 14px;border-radius:9px;text-decoration:none;
+       font-size:13.5px;font-weight:600;background:transparent;color:var(--ink);border:1px solid var(--line)}
+  .ext .act .download:hover{background:var(--panel)}
+  .ext .act .hint{color:var(--dim);font-size:11.5px;margin-left:auto;flex-basis:100%}
+  .ext .act .hint b{color:var(--mut);font-weight:500}
   .ext .act{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:.8rem}
   .ext .install{display:inline-block;background:var(--acid);color:#0b0e14;font-weight:600;font-size:14px;
        border:none;border-radius:9px;padding:9px 18px;cursor:pointer;text-decoration:none;font-family:inherit}
@@ -181,6 +186,11 @@
       you draw. The capture opens in a full-tab editor: crop, annotate, line tool, resizable text,
       redact, save.</div>
     <div class="meta">Settings › Extensions · <span data-live="count"></span></div>
+    <div class="act">
+      <a class="install" href="theseus://extensions/install/screenshot" data-install="screenshot">Install in Theseus</a>
+      <a class="download" data-live="download" href="https://navigate.st/bns/theseus.x/extensions/screenshot/screenshot-0.6.5.tar.gz" download>Download tarball</a>
+      <div class="hint">Updates: signed <a href="./screenshot/updates.json">updates.json</a> · SHA-256 verified before every install</div>
+    </div>
     <div class="verifybox">
       <div class="lbl">Signed update manifest — SHA-256 verified before install</div>
       <div class="h"><b>updates.json</b><code><a href="./screenshot/updates.json">theseus.x/extensions/screenshot/updates.json</a></code></div>
@@ -193,6 +203,9 @@
     <h3><span class="icon">📝</span> Notepad <span class="cur" style="margin-left:auto">bundled 0.1.0</span></h3>
     <div class="desc">Right-sidebar notes. Text lives on this machine only and autosaves as you type.</div>
     <div class="meta">Settings › Extensions · no update channel yet — ships with each Theseus release.</div>
+    <div class="act">
+      <span class="hint" style="margin-left:0"><b>Ships with Theseus</b> — nothing to install; appears under Settings › Extensions on first launch.</span>
+    </div>
   </div>
 
   <div class="ext" id="translate">
@@ -200,6 +213,9 @@
     <div class="desc">Select text on any page and right-click <i>Translate</i> — the sidebar panel shows the translation,
       with LibreTranslate or Google as the backend (your choice in the panel). Nothing is sent until you ask.</div>
     <div class="meta">Settings › Extensions · no update channel yet — ships with each Theseus release.</div>
+    <div class="act">
+      <span class="hint" style="margin-left:0"><b>Ships with Theseus</b> — nothing to install; appears under Settings › Extensions on first launch.</span>
+    </div>
   </div>
 
   <div class="ext" id="pdf-editor" data-ext="pdf-editor">
@@ -209,6 +225,11 @@
       is never touched. Opens from the toolbar's PDF Editor menu or the right-click <i>Open PDF in editor</i>
       on any link.</div>
     <div class="meta">Settings › Extensions · <span data-live="count">signed update channel</span></div>
+    <div class="act">
+      <a class="install" href="theseus://extensions/install/pdf-editor" data-install="pdf-editor">Install in Theseus</a>
+      <a class="download" data-live="download" href="https://navigate.st/bns/theseus.x/extensions/pdf-editor/pdf-editor-0.1.0.tar.gz" download>Download tarball</a>
+      <div class="hint">Updates: signed <a href="./pdf-editor/updates.json">updates.json</a> · SHA-256 verified before every install</div>
+    </div>
     <div class="verifybox">
       <div class="lbl">Signed update manifest — SHA-256 verified before install</div>
       <div class="h"><b>updates.json</b><code><a href="./pdf-editor/updates.json">theseus.x/extensions/pdf-editor/updates.json</a></code></div>
@@ -282,6 +303,7 @@
       set("version", (el) => { el.textContent = top.version; });
       set("sha256", (el) => { el.textContent = top.sha256 || "—"; });
       set("url", (el) => { el.href = top.url; el.textContent = String(top.url).split("/").pop(); });
+      set("download", (el) => { if (top.url) el.href = top.url; });
       set("count", (el) => { el.textContent = list.length + " signed version" + (list.length === 1 ? "" : "s") + " on the channel"; });
     } catch {}
   }