In the left sidebar of the Websites tab, a list of internet powers scrolled by: Camera, Microphone, Location, and then... Pop-up Windows . He clicked it.

Leo was a writer, which meant he lived in two places: his cluttered apartment and the even more cluttered landscape of the internet. But today, he wasn’t researching obscure 19th-century poets. Today, he was trying to buy a last-minute train ticket to see his grandmother.

Two weeks later, his friend called, stuck on a banking site. Leo didn't even hesitate.

He opened his laptop, cracked his knuckles, and muttered, "Alright, Safari. Let's have a talk."

He leaned back, victorious. "You see, Safari," he whispered, closing the laptop. "It's not about letting all the pop-ups in. It's about knowing which doors to unlock."

He found the perfect fare on a budget rail site. He clicked "Confirm Booking." Nothing happened.