The Cerebro browser extension delivers Web Push notifications from your rules even when the tab is closed. Works in Chrome, Brave, Edge, and any Chromium-based browser.
Download (.zip)- 1.Unzip the downloaded file. You'll get a folder named
cerebro-extension-main. - 2.Open in a new tab. Address-bar copy only — browsers block links to
chrome://URLs from the web. - 3.Toggle
Developer mode(top-right ofchrome://extensions). - 4.Click
Load unpackedand pick the unzipped folder. - 5.Click the Cerebro icon in your toolbar →
Subscribe to notifications. You'll see the new destination appear at /settings/destinations.
The extension reads your existing Cerebro session cookie (httpOnly is fine — it goes through chrome.cookies) and uses it as a Bearer token against this site's APIs. No separate sign-in. When you sign out of Cerebro, new subscribe attempts will fail until you sign in again — already-registered pushes keep delivering until the subscription itself rotates.