On Sun, 15 Sep 2019 18:00:49 -0400, micky
wrote:

On a webpage, what does a small square with an arrow pointing to the
upper right corner mean?

It's used on Google translate when one has entered a url instead of
words.

And a Maryland state url said it would mean the browswer was out of
date.

And in a newspaper column link, it's a symbol that just goes with "View
Converstiion, but seems to have no special meaning.

In windows speak (like media player) it means go full screen.