

Like other stated. It used up too much space. Most of want it did can be done via Android or gestures if you have them.
Even the redesigned menu us a bit annoying since it takes one extra button press to get to extensions onto of an upward swipe.
As far as perhaps pitting it for you, try via the Secret Menu, of the mobile version of the Developer Mode.
I second this. Can be set to deletes cookies on XYZ (any or all) domain after ABC seconds after tab close.