With the inline browser I sometime get double scroll bars, one for all the tabs and one for the browser.
Maybe it could be limited to only one?




Some small details...

I agree with Thomas about the brilliant part and also on the tabs shape topic. Maybe the 'legs' could be smaller and not proportional.
I get a strange impression with the empty space created under the browser in adjacent mode, it's quite large when unexpanded.

Maybe the browser background could stretch down to the viewport length.
Also a line under tabs could help visually separating sections. (see image).











It's a massive improvement on organizing and displaying objects, I didn't had the chance to do a complex project yet but I get the impression this tool will be super-flexible, it sure open ways to manage uber-complex projects!

The sweep motion works great!

I don't know if it's been mentioned, but maybe right clicking on the browser button could open it inline or vice-versa..

Great work!

Marc