How to enable push notifications in your browser

To follow the stories of a topic or an author requires your browser settings to have Notifications enabled. How this is done depends on the browser you are using and whether you are on a desktop, tablet, mobile phone and so on.
Below are some ways of doing this for the most popular browsers, but these may change over time as new browser versions are released.
Chrome: click here
Safari: click here
Firefox: click here
Edge: click here