Maybe, maybe not. I think it's overkill, but your proposal is too simple. It might cause false matches if there were a 'www.swf.com' (or even 'www.swfa.com')

I'd probably use something like:

if we're not capturing, there's no reason to need '.*' to get the rest of the line, so a simple alternate (end of line, or a question mark), will work just fine.

It's almost as few characters to use the following, and there would hopefully be less confusion about what it's doing for novices: