Refreshly от Jordan Newby

AutoRefresher automatically reloads any webpage on a schedule you set — full reload, a quiet background refresh with no visible flicker, or auto-clicking a button you choose. It can also alert you the moment specific text appears on the page.

FEATURES
• Three refresh modes: Full reload (standard page refresh), Quiet refresh (updates the page's data in the background without a visible reload — ideal for dashboards or feeds), and Click mode (automatically clicks a button or link you pick, e.g. a "check for updates" or "refresh" button on the page itself).
• Custom interval — set any refresh rate in seconds or minutes.
• Text alerts — type a name, price, or phrase to watch for, and get a desktop notification the instant it appears on the page. Optionally scope the search to just one part of the page (like a single list or table) instead of the whole document.
• Per-site memory — your interval, mode, and alert settings are remembered separately for each website.
• Simple popup UI — no separate settings page, no account, no sign-up.

PRIVACY
AutoRefresher runs entirely in your browser. It doesn't collect, transmit, or sell any data — nothing you type or browse is sent to any server.

Great for auction sites, ticket/stock drops, dashboards, order-status pages, or any site that doesn't auto-update on its own.