Web browsers allow to websites (sites) to show you notifications. So on too many news and shopping sites, you'll see a pop-up telling you that the site wants to display notifications on your desktop.
If the feature bothers you, you can turn off notifications from your browser.
Google Chrome
To turn off this feature in Google Chrome, do click on the menu button and select “Settings”.
Click the “Advanced” link at the bottom of the page, then click the “Content Settings” button located under Protection data and security.
Click on the "Notifications" category
Turn off the setting at the top of the page as shown below picture.
Even after selecting this setting, webpages that you have authorized to display notifications will still display notifications. On the same page below, all the web pages that you have given permission to send you notifications appear.
Mozilla Firefox
Firefox does not allow you to turn off all web alert hints from the application options, but we can do so from about: config.
Type about: config in the Firefox address bar and press Enter. Firefox will display a warning telling you to be careful.
Click "I accept the risk!" and you will be ready to continue.
Type "notifications" in the search box. Double-click the option dom.webnotifications.enabled that appears. This will change the setting to “false“. This means that web alerts will be turned off in Firefox.
This change will turn off all web notifications completely, so you can not choose to receive notifications from one or two sites.
To undo the change, double-click dom.webnotifications.enabled to set the value to “true” again
Microsoft Edge
Microsoft does not provide any feature that allows alerts to be turned off completely. All you can do is change your browser…
Apple Safari
Safari lets you stop sites from asking for your permission to Mission notifications. To find this option, click Safari > Preferences.
Select the "Websites" tab at the top of the window and click "Notifications" in the sidebar.
At the bottom of the window, uncheck the "Allow sites to request permission to send push notifications" box.
The sites to which you have already given permission to send notifications will still be allowed to send even after this option is removed. In the same window, however, you can view and manage the list of pages that have permissions to send notifications.