How to make Google Chrome's tabs behave more like Firefox?
The TooManyTabs for Chrome extension is what you are looking for, until Chrome improves its tabbed interface.
Actually it is known as a "UI: tab overflow" bug and was reported Sep 2 2008. https://bugs.chromium.org/p/chromium/issues/detail?id=188
So almost 10 years passed since then... they had time to fix that, but just didn't want.
They could make it as an optional setting in preferences: "turn on/off tab scaling" or "make scrollable tabs" checkbox.
For me it was main reason why I didn't use Chrome.