After using Chrome for a decade and switching back to Firefox, one feature I missed was the ability to right-click and Go to [url] directly, for any selected text that vaguely resembles a URL.
I made Goto foo to approximately replicate Chrome's behavior in Firefox, but it would be nice if no extension were necessary.
Might not be exactly what you're looking for but check out Linkify Plus Plus, it converts text to an URL when possible. It's pretty amazing, been using it since I can remember.