What are the behaviors of typical web browser address bars?

Question

I need a list of web browser address bar behaviors, as part of a research experiment. For example:

1) The most basic behavior is to type a full web address, e.g. http://www.abc.com and press ENTER to navigate to the web site.

2) Typing just a domain name (e.g. abc) and pressing CTRL+ENTER (on Windows) automatically prepends the http:// and appends the .com and navigates to the web site.

3) In some cases typing abc.com and pressing ENTER navigates to http://www.abc.com - what is the precise heuristic here?

... etc.

Answer 1

As for 3), I do think that it's a redirect, which is being done on the server-side (that is, the server notices you are trying to access the domain directly and redirects to www.*), so no browser-specific behavior here.

And Google Chrome for example treats everything that does not have a valid top-level domain suffix or protocol prefix (such as http://) as a search query, which, on pressing Enter, leads you to Google.com?q={query}