My homepage showing most visited sites got started showing ads, masking themselves as sites I visit the most (needles to say I never visited them before) just 2

My homepage showing most visited sites got started showing ads, masking themselves as sites I visit the most (needles to say I never visited them before) just 2 days after I arrived in Dominican Republic from Europe. As soon as I noticed the ads I just uninstalled the browser, which is basically the strongest signal I can send.