(In reply to Emilio Cobos Álvarez (:emilio) from comment #2)
I think that's expected given how we've always been using these settings, and it also matches what other browsers do... Is this a problem?
Yep, Chromium does.
However, Desktop Icon, Icon in Mint Menu, Icon/control buttons of Document Viewer as well as toggle button size of the Accessibility dialog etc are not change its size. (Of course I restart OS after change settings)
No problem for me,
But I don't know which is the expected result of the MINT.
BTW, on Windows10, Start - Settings - Ease of Access - Display, Make text bigger.
Just change text size only.