+1 to this. Having 'URL actions' similar to 'File actions' would be very useful for me.
Some examples: Sending to an URL shortener, searching on the wayback machine, opening in a different browser. All of these are obviously possible with workflows, but for some reason that's not how my fingers think about the operation.
I usually launch Alfred and paste the URL in habitually -- then nothing happens and I remember to CMD-arrow to the start of the line to insert the workflow name.