Update:
With the last update it disappeared almost everything :-)
Now there is an add-on toolbar hidden by default.
If not over there you can search in the upper right corner where there is a button with the tooltext "Open Menu" (3 horizontal lines). When you press the button it appears a panel, if you select customize on the bottom it will open a page with Additional tools and features. I find over there some of the add-on that I installed.
Original:
Did you refer to the bar that appear with Shift + F2
?
Under Tools-->Web Developer there is the list of tools directly available.
with Crtl + Shift + S
you enable the debugger
with Ctrl + Shift + I
you toggle the tools panel