https://forums.opera.com/topic/7445/does-opera-send-do-not-track-header-to-the-sites
Does opera send "do not track" header to the sites? | Opera forums
Jan 10, 2015 - I check this option in options (Do Not Track) but it doens't work. How it works? For specially sites? Or it's an joke. Why for example yandex.metrika follow my...
do not track headerto theoperasend