Anyone who tried the "HTML5 support" on Wii U quickly learned it's not actually the same as just porting Chrome over to a console.
It was more like Internet Explorer on a console, with all the performance issues you can imagine that being.
If Nintendo is to do this, they need to do it properly with full access given to the browser to interact with the device, which means probably also only for people who are allowed to access the SDK's and buy a dev kit.
Otherwise, it's just not going to be able to function well on the hardware powering the Switch.