It expands as you hover over it just like every other scroll bar on macOS. :)
With all due respect, please do so too.
You could have stated whatever you think is a problem, without adding insults.
Just some feedback for you.
It's used as an indicator not an input.
I honestly thought that the scrollbar didn't work at all until I read this comment. If I put the site on my right monitor, I can grab the scrollbar by just going to the edge. But on my left monitor, where I typically have the browser, it's almost impossible.
I too find it very annoying, especially for such a long article.
Sorry, I'll try to make it more accessible.
It expands in the app as you hover over it. Probably needs a similar thing for the website.
Or I just need to give up and revert it to the standard one. :)