How do you know when people you follow are online? (On Laptop)

If green button is there besides their name, then they are online, and if the button is black, then they are offline

Who is that weird guy who downvoted all the posts in this thread?
Someone help me check because I am not on laptop.

@Vertonghen. If you play in computer and hover the cursor around the upvotes, or downvotes, then you can see the names that reacted.

@Mantram_Patel I know I am on phone now.

Ok.

Zoom out. If you are on chrome if you are at 100% zoom it will not work, at least not for me. 90% zoom is more comfortable and shows this feature.

@OneDummHikk Thanks so much mate, I was zoomed in without knowing, I was zoomed in 100% but at 90% it shows. Thanks so much!!