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mkseven said..
Re browsing Facebook & Google are the worst, if you have Facebook open in browser it can see anything else you open...
It doesn't need to be open.
Websites embed Google and Facebook scripts that follow you around. This is how the ads follow you, for example. You're logging into facebook in the background of the page without even realising.
This very page, that i'm writing in, has some "Symantec Authentication Client", which is rather odd. There's the usual doubleclick/googleAds stuff. And also something for criteo.com, which is "real-time digital advertising performed by machine learning AI bull****"
The web follows most people everywhere. And it can make connections. Those connections could single you out!

But, as most people above have pointed out you are an unimportant, very boring, drop in the ocean. Don't flatter yourself; nobody is interested in you as an individual.

If you are paranoid, or have reason to believe you might actually be important or interesting to anyone use a VPN (or two or more) and something like TOR or the Epic browser. Very simple and will give you much, much, much higher levels of anonyonnymitytononanoyimty.