My concern right now is the bloat of web standards and web browsers: every time the W3C adds a new feature to a web standard, the resources needed to develop a web browser increase, and I believe this is allowing Chrome to monopolize the market.
You can create a new browser by forking Chromium. However, if more Chromium-based browser developers are involved, this will encourage the development of Chromium, and the results will be used for Chrome.
While the multifunctionality of web browsers may improve user convenience, it would harm the user's interests if it prevents market competition. I hope Mozilla stop this vicious cycle.