vulgar websites auto open

[ishu]

My device has been automatically opening various sites on web browser continuously and my device also showing pop up ads continuously And no vulgar apps have been installed on this phone!!

[ADSoomeet]

Check your apps list (Settings > Apps) and see if there's any suspicious app installed.

[ishu]

as i mentioned it's not

[ADSoomeet]

What type of ads you're seeing? Share screenshots please.

[Š]

Which browser?

[ishu]

chrome

[Š]

Try clearing cookies and site data
History > clear browsing data > select time range all time and select only cookies and site data > clear data.