Well, if you start only one window with only one tab of only one application, and that application is heavy, then maybe that amount of memory usage is acceptable.

But if that amount is used for any application, that seems “too much”.

The 2MB sounds more common, and it could also be 8MB alone as you described before.

It is still not clear to me which additional processes were active at the same time when you tested. Maybe I understood wrong, but it seems that you still tested with those additional (optional) processes being active.

In addition, you keep looking / concentrating on the used memory, but not in the free available one.