Glimmer Board stores notes, widgets, spaces, and preferences in Chrome's local extension storage on the current browser profile.
The extension has no account, analytics, advertising, remote database, public submission endpoint, content script, or access to websites you visit. It does not transmit your board. Links remain text-only until you explicitly open them.
Removing the extension or clearing its local data deletes the board from that profile. Exported backups are files you control. Glimmer Board is a personal reflection and planning tool, not medical advice, a medical device, or an emergency channel.