Don't worry, this can be perfectly normal.
Plus many sites integrate with Facebook, Twitter, Reddit, ...
And advertisements sites, Google statistics, ...
All these elements can cause extra connections.
Nothing to worry about.
SANS ISC Handler
Microsoft MVP 2011-2016 Consumer Security, Windows Insider MVP 2016-2018
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Stevens' law: "As an online security discussion grows longer, the probability of a reference to BadUSB approaches 1.0"