There is another way: make your browser THE browser for power users. Add crazy features that appeal to 0.1% of the userbase. Allow a free extension system that allows developers to come up with features you haven't even imagined and see what gets mindshare.
Once you have committed power users who love your product, they will be more than happy to evangelize it to everyone they know. While their friends may not use any of the advanced functionality, they'll still use it if it works okay for them and their friends insist on it.
Mozilla had something like this, and chose to throw it all away to make a browser for Idealized Grandma that more closely resembled Chrome - because Chrome was successful, so they figured they'd copy what they did. But while Chrome was a fine browser, and maybe even better than Firefox in some ways, what this mindset missed is that the main reason for Chrome's dominance was a) being shilled on all the largest web properties, even with popup bars, b) being installed as the default on Android and c), being bundled in installers. Also, if I remember rightly, an advertising campaign. Mozilla was not in a position to do any of this. They should have - and still could - stick to their strength.
Now the only reason to use Firefox is ideological (privacy) and habit. I still use it at home. But I don't bother installing it anywhere else anymore. What's the point?