I'm not convinced JavaScript is a great abstraction for the browser as much as we've forced the web into a shape that fits JavaScript because of a lack of viable alternatives. I'd argue that the popularity of TypeScript implies that dynamic typing is not a universal ideal. Browser engines deal in objects because they're currently all built on top of JavaScript only; that doesn't demonstrate anything fundamental about the web that implies object oriented is the only reasonable representation.

If it gets stuck as a second-class citizen like you're predicting, it sounds a lot more like it's due to inflexibility to consider alternatives than anything objectively better about JavaScript.