Where did facebook come in my web history?

[Divakhan]

I'm surprised and worried, that facebook pages appear in my browser history when I don't use Facebook at all! None other than me uses my laptop. Facebook pages appear in my history and when I delete it, after a while it re-appears!

Why is this happening? Is anyone hacking/tracking me/my laptop?

Please I need urgent help. This is the weirdest thing ever happened.
Edit: I use opera. The internet I use is a wifi at home. (sorry don't know technical terms)

[Sugar Sagar]

Which browser you are using ?
Are you using a public or office network?

[Asmaul]

Nothing wrong with your browser nor with your computer. Someone must using your computer when you are not present there.

Use other browser like google chrome or firefox & check out.