In the screenshot [0] there is also a tab viewing someone's Disqus profile, and you can also see the time and date. I think the suggestion was there may be ways to track down who the hacker is based on this. Of course he could very well be using a VPN (highly likely). Or at the very least a public/free WiFi, although in Russia you have to register with a phone number to access them.
It addresses that in the article: "...notice the open Web browser tab behind his purloined password trove (which is apparently stored at Mega.nz): Troy Hunt’s published research on this 773 million Collection #1"
Sooo this is either a screenshot of Sanixer's machine or of someone who has access to his entire trove. Clearly not the author's.
I see the mega.nz handle "Louren KINGUR" with avatar, and the same person's Google account avatar with no username. I did an image search on this latter one and came up empty handed, but maybe someone with more finesse could find him this way.
[0] https://krebsonsecurity.com/wp-content/uploads/2019/01/sanix...