if they are, it’s not much more than "that thing they heard of sometime", i don’t think the layperson really considers them as alternatives to what they’re using.
i remember, when i first switched to an non-chrome browser many years ago, my friends kept asking me if stuff like google, google drive or google classroom (which our school used) still worked on it. many people don’t know the difference between google chrome (the web browser) and google (the search engine)!