"+hk wang 'Paste Text & Go' lets you add or insert text from clipboard without changing the full URL.

For example, if the URL in location bar is http://www.example.com/ and the text in clipboard is foo
if you right click on the rightmost of the URL and select 'Paste Text & Go', it will load http://www.example.com/foo
or
if you select example in URL, right click and select 'Paste Text & Go', it will load http://www.foo.com/"