Google was late to search, late to smartphones, late to internet email. I'm having a hard time thinking of any of their large markets where they were a first mover, maybe YouTube-ish, widespread user uploaded internet video wasn't meaningfully available before the rise of YouTube.

On topic, Waymo is clearly a first mover in self-driving, having the first legal commercial services.

But, being the first mover is usually more of a disadvantage than an advantage, IMHO.

I'm struggling to think of a single product where the first mover won. At best they are able to hold some market share like Dropbox or Slack, but eventually big tech moves in and crushes them by just offering the same thing but cheaper and more integrated.