I think the crux of the issue should not be just about diversifying the market share. The more important factor is that web standards are basically decided by large corporations especially Google which is what should be more democratic.

The process of Chrome dominating the browser ecosystem is more top-down than people give it credit for. No other organization or corporation can compete with Google because of ridiculous amount of capital they have. They will be playing catch-up with the web standards that Google will be implement better since they decided what they are anyways.