Chrome notifications are push notifications sent by websites or web apps through the browser. These can appear even when the website isn’t open, and they’re meant to re-engage users with timely content or alerts.
How Do Chrome Notifications Work?
User Permission Is Required
A website must ask for your permission before it can send notifications.
You’ll see a browser prompt that says something like “This site wants to send you notifications.”
Service Workers Power It
Notifications rely on Service Workers, which are background scripts that run independently of the webpage.
This means notifications can be sent and received even when the tab is closed (as long as Chrome is running in the background).
Push API + Notification API
Push API: Allows servers to push messages to the browser.
Notification API: Displays those messages as native notifications on your device.
Delivered Like System Notifications
On Windows, macOS, Linux, and Android, Chrome delivers notifications using the system’s built-in notification manager.
On iOS, Chrome doesn’t support web push notifications due to platform limitations (only Safari does).
Web App Integration
Progressive Web Apps (PWAs) can integrate notifications deeply, behaving like native apps with badge icons, rich content, actions, etc.
How They Look
Desktop: Slide up from the corner of your screen.
Mobile: Appear like any app notification.
Privacy & Security
Chrome uses strict policies:
You must manually grant permission.
You can block or revoke access per site.
Spammy sites can be automatically blocked by Chrome.
Managing Notifications
Go to: chrome://settings/content/notifications
From here, you can:
Allow or block specific sites
Turn off all notifications
Reset permissions
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