Earlier quoted context omitted.
The problem with browsers is that it is hard to monetize unless you go down some shady rabbithole. So exactly how are you going to make money and make your first million dollars?
It's actually not that hard to monetize browser extensions, and I think this is changing as the quality of extensions gets better — people are more willing to pay for software that solves their problems, regardless of the format. Here's an extension that makes $38k / month! https://www.indiehackers.com/podcast/187-jordan-oconnor-of-c... And here's one that made at least $100k: https://www.indiehackers.com/product/css…
It's actually not that hard to become a billionaire [points at some billionaires]
By the way, here are some stats on Chrome extensions: https://www.debugbear.com/blog/counting-chrome-extensions