1) all those forks are soft fork that rely on Google's maintenance of chromium. So unless they are willing to invest a LOT more into development, or someone else does a hard fork and puts enough resources into it, whoever buys chrome will inherit a lot of power over those forks.

2) Without the funding from google search, Firefox's future is very much in question. Unlike Apple and MS, Mozilla doesn't really have other funds to pull from to maintain a browser.