This is such a 'first-world' comment. A majority of the folks logging on the web in the developing and emerging world will be unable to afford paying any kind of subscription for their web browser over and above what they pay their ISPs for internet access.
As someone from "the rest of the world" originally, don't worry about that. Piracy will take care of it, just as it does with all other non-free software.
Then unfortunately the internet will remain a luxury for people who aren’t able to afford the cost. The internet is a product, not a charity or human right.
Internet access is already expensive and not available in some places. What kind of cost do you think browser will have 10usd/month subscription? Also there can be free versions of it anyway, google doesn’t have to be the company that does it