You are right seeing this post just made me checked my history and truly one can tell everything about someone by just seeing his or her browsing history, from my browsing history one can tell I love researching about every new thing I come across with and also how interested I am in cryptocurrency.
This topic of yours is very interesting and I think when trying to know about a friend all I need to do is go through his or her browsing history and know somethings about him or her.