I'm not sure I completely agree... Honestly, there are many developers each working on stuff they are either required to do, or want to do. The only time I find the unibar in chrome annoying is when I'm searching for something specific to google... and effectively have to type google twice (first time sets the search site to google).
As for the developer tools, I do wish it was closer to either the chrome dev tools or firebug myself, it looks too much like the IE10+ tools, which I find annoying. But that's a matter of preference.
This is a matter of raw performance, not a subjective UI.. FF has made a lot of effort into improving JS at its' core... Chrome has worked to expanding the DOM in interesting ways. IE has taken a pragmatic approach to refining what comes from both, though having their own issues. The browser ecosystem today is so much better than it has ever really been, and I couldn't be happier about it.
You can relatively easily create your own skin against a Firefox base. AFAIK it's still all XUL wrapped around a web view, and pretty easy to get into, admittedly last time I tried was 6+ years ago. Chrome is still my favorite browser, but I do appreciate what the others are doing... the best ideas do get copied, and it works.