I don't see myself switching away from Firefox any time soon but the "megabar" fiasco really rubs me the wrong way and I hope it isn't indicative of their direction going forward.

In the past when Firefox has changed default behavior there's almost always a way to revert the changes. They move tabs to the title bar to match Chrome, I change an option that puts them back where I like them. They auto hide the bookmark toolbar, I re-enable it. With the latest Firefox release I've yet to find an easy way to disable the godawful, distracting zoom effect for the URL bar. The about:config options that used to work no longer do. I really hope they reverse course and give us a straightforward way to disable it.