iOS9 pop ups.

[H2SO4]

Hi all. I’ll be considering pop up blockers and such like soon, but I’m just wondering if anybody has been receiving pop ups similar to the below?
iPhone 5S on 9.3.5 BTW. Happens both on Wifi and cellular.

the full title bar that second one is;
data:text/html;base64,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


Thx.