No browser has usable titlebars IMO. Chrome just forced out a new update which removed the option to keep the old style titlebar, and now you can't tell which window is active properly, or which tab is active within the window (depending on the settings you apply) if you also want Chrome to use the standard colors (rather than Blue = Active, Different Shade Of Blue = Inactive... blue is hardwired in my mind to mean the active window, since 1995, and that's what it means for all my other apps except the web browsers).
I tried every browser and they are all copying Chrome's bad ideas in that department. (Also Microsoft's, if you look at any of the Metro style apps, which are very hard to tell active from inactive, but it's easy to avoid using any of those outside of brief Windows settings changes.) I can't speak for the rest of the team but I absolutely hate this trend. (Although I am not against having alternatives as options for people who feel differently.)