User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0

Steps to reproduce:

simply just shrink the size of the tab to the minimum using the side arrows(using the mouse)
and they will disappear and the options button might get over the search bar too

NOTE: i have 12 pinned tabs it might help reproducing the issue , and without pinned tabs the "back" and "forward" and "new tab" buttons gets over each other

Actual results:

the close/maximize/minimize buttons disappears and some icons the right of the search bars gets over the search bar

Expected results:

a resize limit should be made such that even if i shrink the window size they won't disappear

yes windows 10 x64bits
intel i7 6700
default theme
nightly firefox

Seems duplication of Bug 583299, Bug 1472745