Firefox Desktop at least lets you know if you've aready got a given URL open.
Chrome does not.
(My "Close tabs" post-it on my desk lamp is dated April 15. 2017.)
Chrome actually does have that feature, but maybe it differs a bit from how Firefox implements it. It gives you a "switch to this tab" option in the omnibox if your input matches the title or URL of an open tab.
It certainly doesn't do that on Mobile.
I abandoned Chrome/desktop years ago.
One of the best extensions is the tree-style-tabs extensions. It puts your tabs on the left/right of your window organised in a tree, makes finding tabs much faster than having tabs at the top (and with modern wide-screen monitors also optimises screen real-estate)