it is really that simple for your Firefox browser

see every Whatsapp contact who is currently online

see the online times for every contact

you can set your own status to permanent "online" or "offline", even if you are not. (you cannot be tracked anymore)

this will prevent that your contact see blue ticks for his messages. (but you will still see the blue ticks on your messages)

you can see in full detail, when your message was sent, received and seen

you can see messages, images, gifs and even videos which was already deleted (even images sent with the "view once" feature) (and you can still download them)

hide all images, messages, names and chats until you hover over them with your mouse, to keep your privacy, if you are not alone with your screen

you can see status images, gifs and videos of alls your contacts without leaving any trace

you can block specific users from the tracker so they wont get tracked, or reverse the blocklist so only whitelisted contacts will be tracked

sort the userlist by alphabet, onlinetime, daily-connections, last-seen or by your custom rule

stores your collected data fully automatically

loads your collected data fully automatically on startup

remove data that is older than, for example, 7 days to keep the history for every user clean