Firefox 4.0 looks like Chrome?

Mozilla has released mockups that show how Firefox 4.0 conceivably might look, and two words spring to my mind: Google Chrome.

Last week, Mozilla showed some mockups for the nearer-term Firefox 3.7 that eliminated the browser’s title bar, replacing it with two drop-down menu buttons on the right, just like Chrome has had since its September 2008 debut. The Firefox 4.0 mockups show two options, one similar to the 3.7 ideas, and the other taking another step in the Chrome direction.

Specifically, the second Firefox 4.0 mockup shows the browser tabs on top where once there was a window title bar. That’s the same approach that Google picked with Chrome, a view of which you can see below.

Mozilla is looking for comment on the designs, which, the browser developer takes pains to note, are “for brainstorming/exploration” and aren’t final.