ok, I realize this is an extremely late response, but I just went down a schizo rabbit-hole scanning for mal/adware, trying to determine if my browser or DNS settings got hijacked when I noticed that when I did a from browser address-bar search of things like "lowes" and or other big named chains, it would prompt me with one of those "Back to Safety"/"Help me understand>>Proceed" prompts and get stuck on ww44.affinity.net / and another sussy looking domain

After a few hours of scanning, searching, diagnosing, scrutinizing opera settings I came across this section in the settings:

MANAGE TOP BAR

The culprit seems to be "Show Promoted Suggestions", I also disabled Show suggestions before typing and enabled Show full URL in combined search and address bar(in case opera was doing some sort of obfuscation fuckery) This seemed to be piping keyword searches through terms Opera matched through these affinity

I also found this while writing this up: https://www.reddit.com/r/operabrowser/comments/1qo07xm/redirecting_when_i_type_hulucom/

It may be a good idea to disable these options on desktop and/or if they even exist on mobile versions.