+1
Declined

Instead of a new window, have a dropdown from button?

Nick Portelli 11 ár síðan updated by vladyslav volovyk 11 ár síðan 1

Or have it an option?  I don't think Chrome allows sidebars like Firefox does.  Maybe even resize the windows so they are side by side and viewable at the same time?

Chrome really does not allow sidebars. 

And drop-down window was considered, tried and unfortunately it has own issues.

This configuration as now really has many advantages, try it for some time. 

I am sure you will like it, i was a former TreeStyleTabs user, used it for many years.

The TabsOutliner approach with new window despite unfamiliar and new actually much more usable. People even start to copy it this way to Firefox - as separate a window.