diff --git a/extensions/index.html b/extensions/index.html
index 1df396e..83d4b6c 100644
--- a/extensions/index.html
+++ b/extensions/index.html
@@ -260,23 +260,6 @@
`).join("");
} catch (e) { box.innerHTML = '
Catalog unavailable right now.
'; }
})();
-
-// Sidenav scroll-spy: highlight the section currently in view.
-(() => {
- const links = document.querySelectorAll(".sidenav a[href^='#']");
- if (!links.length) return;
- const map = new Map();
- links.forEach((a) => { const el = document.querySelector(a.getAttribute("href")); if (el) map.set(el, a); });
- const io = new IntersectionObserver((entries) => {
- entries.forEach((en) => {
- if (!en.isIntersecting) return;
- const a = map.get(en.target); if (!a) return;
- links.forEach((l) => l.classList.remove("active"));
- a.classList.add("active");
- });
- }, { rootMargin: "-40% 0px -55% 0px", threshold: 0 });
- map.forEach((_, el) => io.observe(el));
-})();